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Castles have played an important military, economic and social role in
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and
Ireland Ireland ( ; ga, Éire ; Ulster-Scots: ) is an island in the North Atlantic Ocean, in north-western Europe. It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the s ...
since their introduction following the
Norman invasion of England The Norman Conquest (or the Conquest) was the 11th-century invasion and occupation of England by an army made up of thousands of Norman, Breton, Flemish, and French troops, all led by the Duke of Normandy, later styled William the Conque ...
in 1066. Although a small number of
castle A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars debate the scope of the word ''castle'', but usually consider it to be the private fortified r ...
s had been built in England in the 1050s, the
Normans The Normans ( Norman: ''Normaunds''; french: Normands; la, Nortmanni/Normanni) were a population arising in the medieval Duchy of Normandy from the intermingling between Norse Viking settlers and indigenous West Franks and Gallo-Romans. ...
began to build
motte and bailey A motte-and-bailey castle is a European fortification with a wooden or stone keep situated on a raised area of ground called a motte, accompanied by a walled courtyard, or bailey, surrounded by a protective ditch and palisade. Relatively easy t ...
and ringwork castles in large numbers to control their newly occupied territories in England and the
Welsh Marches The Welsh Marches ( cy, Y Mers) is an imprecisely defined area along the border between England and Wales in the United Kingdom. The precise meaning of the term has varied at different periods. The English term Welsh March (in Medieval Latin ...
. During the 12th century the Normans began to build more castles in stone – with characteristic square
keep A keep (from the Middle English ''kype'') is a type of fortified tower built within castles during the Middle Ages by European nobility. Scholars have debated the scope of the word ''keep'', but usually consider it to refer to large towers in c ...
– that played both military and political roles. Royal castles were used to control key towns and the economically important forests, while
baron Baron is a rank of nobility or title of honour, often hereditary, in various European countries, either current or historical. The female equivalent is baroness. Typically, the title denotes an aristocrat who ranks higher than a lord or kn ...
ial castles were used by the Norman lords to control their widespread estates.
David I David I may refer to: * David I, Caucasian Albanian Catholicos c. 399 * David I of Armenia, Catholicos of Armenia (728–741) * David I Kuropalates of Georgia (died 881) * David I Anhoghin, king of Lori (ruled 989–1048) * David I of Scotland ...
invited Anglo-Norman lords into Scotland in the early 12th century to help him colonise and control areas of his kingdom such as
Galloway Galloway ( ; sco, Gallowa; la, Gallovidia) is a region in southwestern Scotland comprising the historic counties of Wigtownshire and Kirkcudbrightshire. It is administered as part of the council area of Dumfries and Galloway. A native or ...
; the new lords brought castle technologies with them and wooden castles began to be established over the south of the kingdom. Following the
Norman invasion of Ireland The Anglo-Norman invasion of Ireland took place during the late 12th century, when Anglo-Normans gradually conquered and acquired large swathes of land from the Irish, over which the kings of England then claimed sovereignty, all allegedly san ...
in the 1170s, under Henry II, castles were established there too. Castles continued to grow in military sophistication and comfort during the 12th century, leading to a sharp increase in the complexity and length of
siege A siege is a military blockade of a city, or fortress, with the intent of conquering by attrition, or a well-prepared assault. This derives from la, sedere, lit=to sit. Siege warfare is a form of constant, low-intensity conflict characteriz ...
s in England. While in Ireland and Wales castle architecture continued to follow that of England, after the death of Alexander III the trend in Scotland moved away from the construction of larger castles towards the use of smaller
tower house A tower house is a particular type of stone structure, built for defensive purposes as well as habitation. Tower houses began to appear in the Middle Ages, especially in mountainous or limited access areas, in order to command and defend strateg ...
s. The tower house style would also be adopted in the north of England and Ireland in later years. In
North Wales North Wales ( cy, Gogledd Cymru) is a regions of Wales, region of Wales, encompassing its northernmost areas. It borders Mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, ...
Edward I Edward I (17/18 June 1239 – 7 July 1307), also known as Edward Longshanks and the Hammer of the Scots, was King of England and Lord of Ireland from 1272 to 1307. Concurrently, he ruled the duchies of Aquitaine and Gascony as a vas ...
built a sequence of militarily powerful castles after the destruction of the last Welsh polities in the 1270s. By the 14th century castles were combining defences with luxurious, sophisticated living arrangements and heavily landscaped gardens and parks. Many royal and baronial castles were left to decline, so that by the 15th century only a few were maintained for defensive purposes. A small number of castles in England and Scotland were developed into
Renaissance Era The Renaissance ( , ) , from , with the same meanings. is a period in European history marking the transition from the Middle Ages to modernity and covering the 15th and 16th centuries, characterized by an effort to revive and surpass idea ...
palaces that hosted lavish feasts and celebrations amid their elaborate architecture. Such structures were, however, beyond the means of all but royalty and the richest of the late-medieval barons. Although gunpowder weapons were used to defend castles from the late 14th century onwards it became clear during the 16th century that, provided artillery could be transported and brought to bear on a besieged castle, gunpowder weapons could also play an important attack role. The defences of coastal castles around the British Isles were improved to deal with this threat, but investment in their upkeep once again declined at the end of the 16th century. Nevertheless, in the widespread civil and religious conflicts across the British Isles during the 1640s and 1650s, castles played a key role in England. Modern defences were quickly built alongside existing medieval fortifications and, in many cases, castles successfully withstood more than one siege. In Ireland the introduction of heavy siege artillery by
Oliver Cromwell Oliver Cromwell (25 April 15993 September 1658) was an English politician and military officer who is widely regarded as one of the most important statesmen in English history. He came to prominence during the 1639 to 1651 Wars of the Three ...
in 1649 brought a rapid end to the utility of castles in the war, while in Scotland the popular tower houses proved unsuitable for defending against civil war artillery – although major castles such as Edinburgh put up strong resistance. At the end of the war many castles were
slighted Slighting is the deliberate damage of high-status buildings to reduce their value as military, administrative or social structures. This destruction of property sometimes extended to the contents of buildings and the surrounding landscape. It is ...
to prevent future use. Military use of castles rapidly decreased over subsequent years, although some were adapted for use by garrisons in Scotland and key border locations for many years to come, including during the Second World War. Other castles were used as county
gaol A prison, also known as a jail, gaol (dated, English language in England, standard English, Australian English, Australian, and Huron Historic Gaol, historically in Canada), penitentiary (American English and Canadian English), detention cen ...
s, until parliamentary legislation in the 19th closed most of them down. For a period in the early 18th century, castles were shunned in favour of
Palladian architecture Palladian architecture is a European architectural style derived from the work of the Venetian architect Andrea Palladio (1508–1580). What is today recognised as Palladian architecture evolved from his concepts of symmetry, perspective and ...
, until they re-emerged as an important cultural and social feature of England, Wales and Scotland and were frequently "improved" during the 18th and 19th centuries. Such renovations raised concerns over their protection so that today castles across the British Isles are safeguarded by legislation. Primarily used as
tourist attraction A tourist attraction is a place of interest that tourists visit, typically for its inherent or an exhibited natural or cultural value, historical significance, natural or built beauty, offering leisure and amusement. Types Places of natural ...
s, castles form a key part of the national
heritage industry Cultural heritage tourism (or just heritage tourism) is a branch of tourism oriented towards the cultural heritage of the location where tourism is occurring. The National Trust for Historic Preservation in the United States defines heritage ...
. Historians and
archaeologists Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes ...
continue to develop our understanding of British castles, while vigorous academic debates in recent years have questioned the interpretation of physical and documentary material surrounding their original construction and use.


Norman Invasion


Anglo-Saxon fortifications

The English word "
castle A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars debate the scope of the word ''castle'', but usually consider it to be the private fortified r ...
" derives from the
Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through ...
word ''castellum'' and is used to refer to the private fortified residence of a lord or noble. The presence of castles in Britain and Ireland dates primarily from the
Norman invasion of 1066 The Norman Conquest (or the Conquest) was the 11th-century invasion and occupation of England by an army made up of thousands of Norman, Breton, Flemish, and French troops, all led by the Duke of Normandy, later styled William the Conque ...
. Before the arrival of the
Normans The Normans ( Norman: ''Normaunds''; french: Normands; la, Nortmanni/Normanni) were a population arising in the medieval Duchy of Normandy from the intermingling between Norse Viking settlers and indigenous West Franks and Gallo-Romans. ...
the
Anglo-Saxons The Anglo-Saxons were a cultural group who inhabited England in the Early Middle Ages. They traced their origins to settlers who came to Britain from mainland Europe in the 5th century. However, the ethnogenesis of the Anglo-Saxons happened ...
had built
burh A burh () or burg was an Old English fortification or fortified settlement. In the 9th century, raids and invasions by Vikings prompted Alfred the Great to develop a network of burhs and roads to use against such attackers. Some were new const ...
s, fortified structures with their origins in 9th-century
Wessex la, Regnum Occidentalium Saxonum , conventional_long_name = Kingdom of the West Saxons , common_name = Wessex , image_map = Southern British Isles 9th century.svg , map_caption = S ...
. Most of these, especially in urban areas, were large enough to be best described as fortified townships rather than private dwellings and are therefore not usually classed as castles. Rural ''burhs'' were smaller and usually consisted of a wooden hall with a wall enclosing various domestic buildings along with an entrance tower called a ''burh-geat'', which was apparently used for ceremonial purposes. Although rural ''burhs'' were relatively secure their role was primarily ceremonial and they too are not normally classed as castles. There were, however, a small number of castles which were built in England during the 1050s, probably by Norman knights in the service of
Edward the Confessor Edward the Confessor ; la, Eduardus Confessor , ; ( 1003 – 5 January 1066) was one of the last Anglo-Saxon English kings. Usually considered the last king of the House of Wessex, he ruled from 1042 to 1066. Edward was the son of Æt ...
.Liddiard (2005), p. 37. These include
Hereford Hereford () is a cathedral city, civil parish and the county town of Herefordshire, England. It lies on the River Wye, approximately east of the border with Wales, south-west of Worcester, England, Worcester and north-west of Gloucester. ...
, Clavering,
Richard's Castle Richard's Castle is a village, castle and two civil parishes on the border of the counties of Herefordshire and Shropshire in England. The Herefordshire section of the parish had a population of 250 at the 2011 Census. The Shropshire section ...
and possibly
Ewyas Harold Castle Ewyas Harold Castle was a castle in the village of Ewyas Harold in Herefordshire, England. History The first castle on the site is believed to be one of the very few which were built under the Saxons before the Norman conquest. This structur ...
and
Dover Dover () is a town and major ferry port in Kent, South East England. It faces France across the Strait of Dover, the narrowest part of the English Channel at from Cap Gris Nez in France. It lies south-east of Canterbury and east of Maids ...
.


Invasion

William William is a male given name of Germanic origin.Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 276. It became very popular in the English language after the Norman conquest of Engl ...
,
Duke of Normandy In the Middle Ages, the duke of Normandy was the ruler of the Duchy of Normandy in north-western France. The duchy arose out of a grant of land to the Viking leader Rollo by the French king Charles III in 911. In 924 and again in 933, Normand ...
, invaded England in 1066 and one of his first actions after landing was to build
Hastings Castle Hastings Castle is a keep and bailey castle ruin situated in the town of Hastings, East Sussex. It overlooks the English Channel, into which large parts of the castle have fallen over the years. History Immediately after landing in Englan ...
to protect his supply routes. Following their victory at the
battle of Hastings The Battle of Hastings nrf, Batâle dé Hastings was fought on 14 October 1066 between the Norman-French army of William, the Duke of Normandy, and an English army under the Anglo-Saxon King Harold Godwinson, beginning the Norman Conque ...
the Normans began three phases of castle building. The first of these was the establishment, by the new king, of a number of royal castles in key strategic locations. This royal castle programme focused on controlling the towns and cities of England and the associated lines of communication, including
Cambridge Cambridge ( ) is a university city and the county town in Cambridgeshire, England. It is located on the River Cam approximately north of London. As of the 2021 United Kingdom census, the population of Cambridge was 145,700. Cambridge bec ...
,
Huntingdon Huntingdon is a market town in the Huntingdonshire district in Cambridgeshire, England. The town was given its town charter by John, King of England, King John in 1205. It was the county town of the historic county of Huntingdonshire. Oliver Cr ...
,
Lincoln Lincoln most commonly refers to: * Abraham Lincoln (1809–1865), the sixteenth president of the United States * Lincoln, England, cathedral city and county town of Lincolnshire, England * Lincoln, Nebraska, the capital of Nebraska, U.S. * Lincol ...
,
Norwich Norwich () is a cathedral city and district of Norfolk, England, of which it is the county town. Norwich is by the River Wensum, about north-east of London, north of Ipswich and east of Peterborough. As the seat of the Episcopal see, See of ...
,
Nottingham Nottingham ( , locally ) is a city and unitary authority area in Nottinghamshire, East Midlands, England. It is located north-west of London, south-east of Sheffield and north-east of Birmingham. Nottingham has links to the legend of Robi ...
, Wallingford,
Warwick Warwick ( ) is a market town, civil parish and the county town of Warwickshire in the Warwick District in England, adjacent to the River Avon, Warwickshire, River Avon. It is south of Coventry, and south-east of Birmingham. It is adjoined wit ...
and
York York is a cathedral city with Roman origins, sited at the confluence of the rivers Ouse and Foss in North Yorkshire, England. It is the historic county town of Yorkshire. The city has many historic buildings and other structures, such as a ...
. Of the castles built by William the Conqueror two-thirds were built in towns and cities, often those with the former Anglo-Saxon
mints A mint or breath mint is a food item often consumed as an after-meal refreshment or before business and social engagements to improve breath odor. Mints are commonly believed to soothe the stomach given their association with natural byproducts ...
.Liddiard (2005), p. 18. These urban castles could make use of the existing town's walls and fortifications, but typically required the demolition of local houses to make space for them. This could cause extensive damage, and records suggest that in
Lincoln Lincoln most commonly refers to: * Abraham Lincoln (1809–1865), the sixteenth president of the United States * Lincoln, England, cathedral city and county town of Lincolnshire, England * Lincoln, Nebraska, the capital of Nebraska, U.S. * Lincol ...
166 houses were destroyed, with 113 in Norwich and 27 in Cambridge. Some of these castles were deliberately built on top of important local buildings, such as the ''burhs'' or halls of local nobles, and might be constructed so as to imitate aspects of the previous buildings – such as the gatehouse at
Rougemont Castle Rougemont Castle, also known as Exeter Castle, is the historic castle of the city of Exeter, Devon, England. It was built into the northern corner of the Roman city walls starting in or shortly after the year 1068, following Exeter's rebellion ...
in
Exeter Exeter () is a city in Devon, South West England. It is situated on the River Exe, approximately northeast of Plymouth and southwest of Bristol. In Roman Britain, Exeter was established as the base of Legio II Augusta under the personal comm ...
, which closely resembled the previous Anglo-Saxon ''burh'' tower – this was probably done to demonstrate to the local population that they now answered to their new Norman rulers. The second and third waves of castle building were led by the major magnates, and then by the more junior knights on their new estates. The apportionment of the conquered lands by the king influenced where these castles were built. In a few key locations the king gave his followers compact groups of estates including the six
rapes Rape is a type of sexual assault usually involving sexual intercourse or other forms of sexual penetration carried out against a person without their consent. The act may be carried out by physical force, coercion, Abusive power and control, ...
of
Sussex Sussex (), from the Old English (), is a historic county in South East England that was formerly an independent medieval Anglo-Saxon kingdom. It is bounded to the west by Hampshire, north by Surrey, northeast by Kent, south by the Englis ...
and the three earldoms of
Chester Chester is a cathedral city and the county town of Cheshire, England. It is located on the River Dee, close to the English–Welsh border. With a population of 79,645 in 2011,"2011 Census results: People and Population Profile: Chester Loca ...
,
Shrewsbury Shrewsbury ( , also ) is a market town, civil parish, and the county town of Shropshire, England, on the River Severn, north-west of London; at the 2021 census, it had a population of 76,782. The town's name can be pronounced as either 'Sh ...
and
Hereford Hereford () is a cathedral city, civil parish and the county town of Herefordshire, England. It lies on the River Wye, approximately east of the border with Wales, south-west of Worcester, England, Worcester and north-west of Gloucester. ...
; intended to protect the line of communication with
Normandy Normandy (; french: link=no, Normandie ; nrf, Normaundie, Nouormandie ; from Old French , plural of ''Normant'', originally from the word for "northman" in several Scandinavian languages) is a geographical and cultural region in Northwestern ...
and the Welsh border respectively. In these areas a baron's castles were clustered relatively tightly together, but in most of England the nobles' estates, and therefore their castles, were more widely dispersed. As the Normans pushed on into South Wales they advanced up the valleys building castles as they went and often using the larger castles of the neighbouring earldoms as a base. As a result, castle building by the Norman nobility across England and the Marches lacked a grand strategic plan, reflecting local circumstances such as military factors and the layout of existing estates and church lands. Castles were often situated along the old Roman roads that still formed the backbone for travel across the country, both to control the lines of communication and to ensure easy movement between different estates. Many castles were built close to inland river ports and those built on the coast were usually located at the mouths of rivers or in ports,
Pevensey Pevensey ( ) is a village and civil parish in the Wealden district of East Sussex, England. The main village is located north-east of Eastbourne, one mile (1.6 km) inland from Pevensey Bay. The settlement of Pevensey Bay forms part ...
and
Portchester Portchester is a locality and suburb northwest of Portsmouth, England. It is part of the Fareham (borough), borough of Fareham in Hampshire. Once a small village, Portchester is now a busy part of the expanding conurbation between Portsmouth ...
being rare exceptions. Some groups of castles were located so as to be mutually reinforcing – for example the castles of Littledean Camp, Glasshouse Woods and Howle Hill Camp were intended to act as an integrated defence for the area around
Gloucester Gloucester ( ) is a cathedral city and the county town of Gloucestershire in the South West of England. Gloucester lies on the River Severn, between the Cotswolds to the east and the Forest of Dean to the west, east of Monmouth and east o ...
and
Gloucester Castle Gloucester Castle was a Norman-era royal castle situated in the city of Gloucester in Gloucestershire, England. It was demolished in 1787 and replaced by Gloucester Prison. Early Norman motte and bailey castle It was probably constructe ...
for Gloucester city itself, while
Windsor Windsor may refer to: Places Australia * Windsor, New South Wales ** Municipality of Windsor, a former local government area * Windsor, Queensland, a suburb of Brisbane, Queensland **Shire of Windsor, a former local government authority around Wi ...
was one of a ring of castles built around London, each approximately a day's march apart. Some regional patterns in castle building can also be seen – relatively few castles were built in East Anglia compared to the west of England or the Marches; this was probably due to the relatively settled and prosperous nature of the east of England and reflected a shortage of available
serf Serfdom was the status of many peasants under feudalism, specifically relating to manorialism, and similar systems. It was a condition of debt bondage and indentured servitude with similarities to and differences from slavery, which developed ...
s, or
unfree labour Forced labour, or unfree labour, is any work relation, especially in modern or early modern history, in which people are employed against their will with the threat of destitution, detention, violence including death, or other forms of ex ...
. Not all of the castles were occupied simultaneously. Some were built during the invasions and then abandoned while other new castles were constructed elsewhere, especially along the western borders. Recent estimates suggest that between 500 and 600 castles were occupied at any one time in the post-conquest period.


Architecture

There was a large degree of variation in the size and exact shape of the castles built in England and Wales after the invasion. One popular form was the
motte and bailey A motte-and-bailey castle is a European fortification with a wooden or stone keep situated on a raised area of ground called a motte, accompanied by a walled courtyard, or bailey, surrounded by a protective ditch and palisade. Relatively easy t ...
, in which earth would be piled up into a mound (called a ''motte'') to support a wooden tower, and a wider enclosed area built alongside it (called a bailey);
Stafford Castle Stafford Castle is an ancient Grade II listed castle situated two miles west of the town of Stafford in Staffordshire, England. From the time of the Norman Conquest and as recorded in the Domesday Book of 1086 it was the seat of the powerful Ang ...
is a typical example of a post-invasion motte castle. Another widespread design was the ring work in which earth would be built up in a circular or oval shape and topped with a wooden rampart; Folkestone Castle is a good example of a Norman ring work, in this case built on top of a hill although most post-invasion castles were usually sited on lower ground. Around 80 per cent of Norman castles in this period followed the motte-and-bailey pattern, but ring works were particularly popular in certain areas, such as south-west England and south Wales. One theory put forward to explain this variation is that ringworks were easier to build in these shallow-soil areas than the larger mottes. The White Tower in London and the keep of
Colchester Castle Colchester Castle is a Norman castle in Colchester, Essex, England, dating from the second half of the eleventh century. The keep of the castle is mostly intact and is the largest example of its kind anywhere in Europe, due to its being buil ...
were the only stone castles to be built in England immediately after the conquest, both with the characteristic square Norman
keep A keep (from the Middle English ''kype'') is a type of fortified tower built within castles during the Middle Ages by European nobility. Scholars have debated the scope of the word ''keep'', but usually consider it to refer to large towers in c ...
.Liddiard (2005), p. 34. Both these castles were built in the Romanesque style and were intended to impress as well as provide military protection. In Wales the first wave of the Norman castles were again made of wood, in a mixture of motte-and-bailey and ringwork designs, with the exception of the stone built
Chepstow Castle Chepstow Castle ( cy, Castell Cas-gwent) at Chepstow, Monmouthshire, Wales is the oldest surviving post-Roman stone fortification in Britain. Located above cliffs on the River Wye, construction began in 1067 under the instruction of the Norman ...
. Chepstow too was heavily influenced by Romanesque design, reusing numerous materials from the nearby ''
Venta Silurum Venta Silurum was a town in the Roman province of ''Britannia'' or Britain. Today it consists of remains in the village of Caerwent in Monmouthshire, south east Wales. Much of it has been archaeologically excavated and is on display to the publ ...
'' to produce what historian Robert Liddiard has termed "a play upon images from Antiquity". The size of these castles varied depending on the geography of the site, the decisions of the builder and the available resources. Analysis of the size of mottes has shown some distinctive regional variation;
East Anglia East Anglia is an area in the East of England, often defined as including the counties of Norfolk, Suffolk and Cambridgeshire. The name derives from the Anglo-Saxon kingdom of the East Angles, a people whose name originated in Anglia, in ...
, for example, saw much larger mottes being built than
the Midlands The Midlands (also referred to as Central England) are a part of England that broadly correspond to the Kingdom of Mercia of the Early Middle Ages, bordered by Wales, Northern England and Southern England. The Midlands were important in the In ...
or London. While motte-and-bailey and ring-work castles took great effort to build, they required relatively few skilled craftsmen allowing them to be raised using forced labour from the local estates; this, in addition to the speed with which they could be built – a single season, made them particularly attractive immediately after the conquest. The larger earthworks, particularly mottes, required an exponentially greater quantity of manpower than their smaller equivalents and consequently tended to be either royal, or belong to the most powerful barons who could muster the required construction effort. Despite motte-and-bailey and ringworks being common designs amongst Norman castles, each fortification was slightly different – some castles were designed with two baileys attached to a single motte, and some ring works were built with additional towers added on; yet other castles were built as ringworks and later converted to motte-and-bailey structures.


12th century


Developments in castle design

From the early 12th century onwards the Normans began to build new castles in stone and convert existing timber designs.Brown (1962), p. 36. This was initially a slow process, picking up speed towards the second half of the century. Traditionally this transition was believed to have been driven by the more crude nature of wooden fortifications, the limited life of timber in wooden castles and its vulnerability to fire; recent archaeological studies have however shown that many wooden castles were as robust and as complex as their stone equivalents. Some wooden castles were not converted into stone for many years and instead expanded in wood, such as at
Hen Domen Hen Domen Welsh, meaning "old mound", is the site of a medieval timber motte-and-bailey castle in Powys, Wales. It is the site of the original Montgomery Castle, and was built by Roger de Montgomery in 1070. From 1105 the castle was the home of t ...
. Several early stone keeps had been built after the conquest, with somewhere between ten and fifteen in existence by 1100, and more followed in the 12th century until around 100 had been built by 1216. Typically these were four sided designs with the corners reinforced by
pilaster In classical architecture, a pilaster is an architectural element used to give the appearance of a supporting column and to articulate an extent of wall, with only an ornamental function. It consists of a flat surface raised from the main wal ...
buttress A buttress is an architectural structure built against or projecting from a wall which serves to support or reinforce the wall. Buttresses are fairly common on more ancient buildings, as a means of providing support to act against the lateral (s ...
es.Toy (1985), p. 66. Keeps were up to four storeys high, with the entrance on the first storey to prevent the door from being easily broken down. The strength of the design typically came from the thickness of the walls: usually made of rag-stone, as in the case of
Dover Castle Dover Castle is a medieval castle in Dover, Kent, England and is Grade I listed. It was founded in the 11th century and has been described as the "Key to England" due to its defensive significance throughout history. Some sources say it is th ...
, these walls could be up to thick. The larger keeps were subdivided by an internal wall while the smaller versions, such as that at Goodrich, had a single, slightly cramped chamber on each floor. Stone keeps required skilled craftsmen to build them; unlike unfree labour or serfs, these men had to be paid and stone keeps were therefore expensive.Pounds (1994), p. 20. They were also relatively slow to erect – a keep's walls could usually only be raised by a maximum of a year, the keep at Scarborough was typical in taking ten years to build. Norman stone keeps played both a military and a political role. Most of the keeps were physically extremely robust and, while they were not designed as an intended location for the final defence of a castle, they were often placed near weak points in the walls to provide supporting fire. Many keeps made compromises to purely military utility:
Norwich Castle Norwich Castle is a medieval royal fortification in the city of Norwich, in the English county of Norfolk. William the Conqueror (1066–1087) ordered its construction in the aftermath of the Norman conquest of England. The castle was used as a ...
included elaborate blind arcading on the outside of the building, in a Roman style, and appears to had a ceremonial entrance route; The interior of the keep at Hedingham could have hosted impressive ceremonies and events, but contained numerous flaws from a military perspective. Similarly there has been extensive debate over the role of
Orford Castle Orford Castle is a castle in Orford in the English county of Suffolk, northeast of Ipswich, with views over Orford Ness. It was built between 1165 and 1173 by Henry II of England to consolidate royal power in the region. The well-preserved ke ...
whose expensive, three-cornered design most closely echoes imperial
Byzantine The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...
palaces and may have been intended by Henry II to be more symbolic than military in nature. Another improvement from the 12th century onwards was the creation of
shell keep A shell keep is a style of medieval fortification, best described as a stone structure circling the top of a motte. In English castle morphology, shell keeps are perceived as the successors to motte-and-bailey castles, with the wooden fence aro ...
s, involving replacing the wooden keep on the motte with a circular stone wall.Brown (1962), p. 42. Buildings could be built around the inside of the shell, producing a small inner courtyard.
Restormel Castle Restormel Castle ( kw, Kastel Rostorrmel) lies by the River Fowey near Lostwithiel in Cornwall, England, UK. It is one of the four chief Norman castles of Cornwall, the others being Launceston, Tintagel and Trematon. The castle is notable for ...
is a classic example of this development with a perfectly circular wall and a square entrance tower while the later
Launceston Castle Launceston Castle is located in the town of Launceston, Cornwall, England. It was probably built by Robert the Count of Mortain after 1068, and initially comprised an earthwork and timber castle with a large motte in one corner. Launceston Castl ...
, although more ovoid than circular, is another good example of the design and one of the most formidable castles of the period. Round castles were unusually popular throughout Cornwall and Devon. Although the circular design held military advantages, these only really mattered in the 13th century onwards; the origins of 12th-century circular design were the circular design of the mottes; indeed, some designs were less than circular in order to accommodate irregular mottes, such as that at
Windsor Castle Windsor Castle is a royal residence at Windsor in the English county of Berkshire. It is strongly associated with the English and succeeding British royal family, and embodies almost a millennium of architectural history. The original c ...
.Hulme, p. 222.


Economy and society

English castles during the period were divided into those royal castles owned by the king, and baronial castles controlled by the Anglo-Norman lords. According to chronicler
William of Newburgh William of Newburgh or Newbury ( la, Guilelmus Neubrigensis, ''Wilhelmus Neubrigensis'', or ''Willelmus de Novoburgo''. 1136 – 1198), also known as William Parvus, was a 12th-century English historian and Augustinian canon of Anglo-Saxon de ...
royal castles formed the "bones of the kingdom". A number of royal castles were also designated as shrieval castles, forming the administrative hub for a particular county – for example
Winchester Castle Winchester Castle is a medieval building in Winchester, Hampshire, England. It was founded in 1067. Only the Great Hall still stands; it houses a museum of the history of Winchester. History Early history Around AD 70 the Romans constructed a ...
served as the centre of
Hampshire Hampshire (, ; abbreviated to Hants) is a ceremonial and non-metropolitan county in western South East England on the coast of the English Channel. Home to two major English cities on its south coast, Southampton and Portsmouth, Hampshire ...
. These castles formed a base for the royal
sheriff A sheriff is a government official, with varying duties, existing in some countries with historical ties to England where the office originated. There is an analogous, although independently developed, office in Iceland that is commonly transla ...
, responsible for enforcing royal justice in the relevant shire; the role of the sheriff became stronger and clearer as the century progressed. A number of royal castles were linked to forests and other key resources. Royal forests in the early medieval period were subject to special royal jurisdiction; forest law was, as historian Robert Huscroft describes it, "harsh and arbitrary, a matter purely for the King's will" and forests were expected to supply the king with hunting grounds, raw materials, goods and money. Forests were typically tied to castles, both to assist with the enforcement of the law and to store the goods being extracted from the local economy:
Peveril Castle Peveril Castle (also Castleton Castle or Peak Castle) is a ruined 11th-century castle overlooking the village of Castleton in the English county of Derbyshire. It was the main settlement (or ''caput'') of the feudal barony of William Peverel, kn ...
was linked to the
Peak Forest Peak Forest is a small village and civil parish on the main road the ( A623) from Chapel-en-le-Frith to Chesterfield in Derbyshire. The population of the civil parish at the 2011 census was 335. The village grew from the earlier settlement of ...
and the local lead mining there; St Briavels was tied to the
Forest of Dean The Forest of Dean is a geographical, historical and cultural region in the western part of the county of Gloucestershire, England. It forms a roughly triangular plateau bounded by the River Wye to the west and northwest, Herefordshire to ...
; and
Knaresborough Knaresborough ( ) is a market and spa town and civil parish in the Borough of Harrogate, in North Yorkshire, England, on the River Nidd. It is east of Harrogate. History Knaresborough is mentioned in the Domesday Book of 1086 as ''Chenar ...
, Rockingham and Pickering to their eponymous forests respectively. In the south-west, where the Crown oversaw the lead mining industry, castles such as
Restormel Restormel ( kw, Rostorrmel) was a borough of Cornwall, England, United Kingdom, one of the six administrative divisions that made up the county. Its council was based in St Austell; its other towns included Newquay. The borough was named after ...
played an important role running the local stannery courts. Baronial castles were of varying size and sophistication; some were classed as a ''
caput Latin words and phrases {{Short pages monitor