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A moat is a deep, broad ditch, either dry or filled with water, that is dug and surrounds a
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 ...
, fortification, building or town, historically to provide it with a preliminary line of
defence Defense or defence may refer to: Tactical, martial, and political acts or groups * Defense (military), forces primarily intended for warfare * Civil defense, the organizing of civilians to deal with emergencies or enemy attacks * Defense indus ...
. In some places moats evolved into more extensive water defences, including natural or artificial lakes, dams and sluices. In older fortifications, such as hillforts, they are usually referred to simply as
ditches A ditch is a small to moderate divot created to channel water. A ditch can be used for drainage, to drain water from low-lying areas, alongside roadways or fields, or to channel water from a more distant source for plant irrigation. Ditches ...
, although the function is similar. In later periods, moats or water defences may be largely ornamental. They could also act as a sewer.


Historical use


Ancient

Some of the earliest evidence of moats has been uncovered around ancient Egyptian castles. One example is at Buhen, a castle excavated in
Nubia Nubia () ( Nobiin: Nobīn, ) is a region along the Nile river encompassing the area between the first cataract of the Nile (just south of Aswan in southern Egypt) and the confluence of the Blue and White Niles (in Khartoum in central Sud ...
. Other evidence of ancient moats is found in the ruins of Babylon, and in reliefs from ancient Egypt,
Assyria Assyria ( Neo-Assyrian cuneiform: , romanized: ''māt Aššur''; syc, ܐܬܘܪ, ʾāthor) was a major ancient Mesopotamian civilization which existed as a city-state at times controlling regional territories in the indigenous lands of the A ...
, and other cultures in the region. Evidence of early moats around settlements has been discovered in many archaeological sites throughout Southeast Asia, including Noen U-Loke, Ban Non Khrua Chut, Ban Makham Thae and Ban Non Wat. The use of the moats could have been either for defensive or agriculture purposes.


Medieval

Moats were excavated around
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 and other fortifications as part of the defensive system as an obstacle immediately outside the walls. In suitable locations they might be filled with water. A moat made access to the walls difficult for siege weapons such as siege towers and battering rams, which needed to be brought up against a wall to be effective. A water-filled moat made the practice of
mining Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the econom ...
- digging tunnels under the castles in order to effect a collapse of the defences - very difficult as well. ''Segmented moats'' have one dry section and one section filled with water. Dry moats that cut across the narrow part of a spur or peninsula are called '' neck ditches''. Moats separating different elements of a castle, such as the inner and outer wards, are ''cross ditches''. The word was adapted in
Middle English Middle English (abbreviated to ME) is a form of the English language that was spoken after the Norman conquest of 1066, until the late 15th century. The English language underwent distinct variations and developments following the Old Englis ...
from the
Old French Old French (, , ; Modern French: ) was the language spoken in most of the northern half of France from approximately the 8th to the 14th centuries. Rather than a unified language, Old French was a linkage of Romance dialects, mutually intel ...
''motte'' "mound, hillock" and was first applied to the central mound on which a castle was erected (see
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 then came to be applied to the excavated ring, a ‘dry moat’. The shared derivation implies that the two features were closely related and possibly constructed at the same time. The term ''moat'' is also applied to natural formations reminiscent of the artificial structure and to similar modern architectural features.


Later western fortification

With the introduction of siege
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during si ...
, a new style of fortification emerged in the 16th century using low walls and projecting strong points called bastions, which was known as the '' trace italienne''. The walls were further protected from infantry attack by wet or dry moats, sometimes in elaborate systems. When this style of fortification was superseded by lines of polygonal forts in the mid-19th century, moats continued to be used for close protection.


Africa

The
Walls of Benin The Walls of Benin are a series of earthworks made up of banks and ditches, called ''ya'' in the Edo language, in the area around present-day Benin City, the capital of present-day Edo, Nigeria. They consist of of city iya and an estimated of ...
were a combination of ramparts and moats, called Iya, used as a defence of the capital
Benin City Benin City is the capital and largest city of Edo State, Nigeria. It is the fourth-largest city in Nigeria according to the 2006 census, after Lagos, Kano, and Ibadan, with a population estimate of about 3,500,000 as of 2022. It is situated ap ...
in present-day Edo State of Nigeria. It was considered the largest man-made structure lengthwise, second only to the Great Wall of China and the largest earthwork in the world. Recent work by Patrick Darling has established it as the largest man-made structure in the world, larger than Sungbo's Eredo, also in Nigeria. It enclosed 6,500 km2 of community lands. Its length was over 16,000 km of earth boundaries. It was estimated that earliest construction began in 800 and continued into the mid-15th century. The walls are built of a ditch and dike structure, the ditch dug to form an inner moat with the excavated earth used to form the exterior rampart. The Benin Walls were ravaged by the British in 1897. Scattered pieces of the walls remain in Edo, with material being used by the locals for building purposes. The walls continue to be torn down for real-estate developments. The Walls of Benin City were the world's largest man-made structure. Fred Pearce wrote in New Scientist: "They extend for some 16,000 kilometres in all, in a mosaic of more than 500 interconnected settlement boundaries. They cover 6,500 square kilometres and were all dug by the Edo people. In all, they are four times longer than the Great Wall of China, and consumed a hundred times more material than the Great Pyramid of Cheops. They took an estimated 150 million hours of digging to construct, and are perhaps the largest single archaeological phenomenon on the planet."


Asia

Japanese castles often have very elaborate moats, with up to three moats laid out in concentric circles around the castle and a host of different patterns engineered around the landscape. The outer moat of a Japanese castle typically protects other support buildings in addition to the castle. As many Japanese castles have historically been a very central part of their cities, the moats have provided a vital waterway to the city. Even in modern times the moat system of the Tokyo Imperial Palace consists of a very active body of water, hosting everything from rental boats and fishing ponds to restaurants. Most modern Japanese castles have moats filled with water, but castles in the feudal period more commonly had 'dry moats' , a
trench A trench is a type of excavation or in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit). In geology, trenches result from ero ...
. A is a dry moat dug into a slope. A is a series of parallel trenches running up the sides of the excavated mountain, and the earthen wall, which was also called , was an outer wall made of earth dug out from a moat. Even today it is common for mountain Japanese castles to have dry moats. A is a moat filled with water. Moats were also used in the
Forbidden City The Forbidden City () is a palace complex in Dongcheng District, Beijing, China, at the center of the Imperial City of Beijing. It is surrounded by numerous opulent imperial gardens and temples including the Zhongshan Park, the sacrifi ...
and Xi'an in China; in
Vellore Vellore (English: ), also spelt as Velur (), is a city and the administrative headquarters of Vellore district in the Indian state of Tamil Nadu. It is located on the banks of the Palar River in the northeastern part of Tamil Nadu and is separa ...
in India; Hsinchu in
Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the no ...
; and in Southeast Asia, such as at
Angkor Wat Angkor Wat (; km, អង្គរវត្ត, "City/Capital of Temples") is a temple complex in Cambodia and is the largest religious monument in the world, on a site measuring . Originally constructed as a Hindu temple dedicated to the g ...
in
Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand ...
; Mandalay in
Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...
and Chiang Mai in
Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...
.


Australia

The only moated fort ever built in Australia was
Fort Lytton Fort Lytton is a heritage-listed 19th century coastal fort in the suburb of Lytton in Brisbane, Queensland, Australia. The name “Fort Lytton” is also used to describe the military base that surrounded the fort. Fort Lytton was built in ...
in
Brisbane Brisbane ( ) is the capital and most populous city of the Australian state of Queensland, and the third-most populous city in Australia and Oceania, with a population of approximately 2.6 million. Brisbane lies at the centre of the South ...
. As Brisbane was much more vulnerable to attack than either Sydney or Melbourne a series of coastal defences was built throughout Moreton Bay, Fort Lytton being the largest. Built between 1880 and 1881 in response to fear of a Russian invasion, it is a pentagonal fortress concealed behind grassy embankments and surrounded by a water-filled moat.


North America

Moats were developed independently by
North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and th ...
n
indigenous people Indigenous peoples are culturally distinct ethnic groups whose members are directly descended from the earliest known inhabitants of a particular geographic region and, to some extent, maintain the language and culture of those original people ...
of the Mississippian culture as the outer defence of some fortified villages. The remains of a 16th-century moat are still visible at the Parkin Archeological State Park in eastern
Arkansas Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the O ...
. The Maya people also used moats, for example in the city of Becan. European colonists in the Americas often built dry ditches surrounding forts built to protect important landmarks, harbours or cities (e.g. Fort Jay on Governors Island in
New York Harbor New York Harbor is at the mouth of the Hudson River where it empties into New York Bay near the East River tidal estuary, and then into the Atlantic Ocean on the east coast of the United States. It is one of the largest natural harbors in ...
).


Photo gallery

Image:Muiderslot september 2007.JPG,
Muiderslot Muiden Castle (Dutch: ''Muiderslot'', ) is a castle in the Netherlands, located at the mouth of the Vecht river, some 15 kilometers southeast of Amsterdam, in Muiden, where it flows into what used to be the Zuiderzee. It is one of the better kn ...
,
Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...
Image:The moat around Fort Pulaski, Savannah, GA IMG 4673.JPG, Moat surrounding Fort Pulaski National Monument near
Savannah A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...
, Georgia Image:Keep of Matsumoto Castle.JPG,
Matsumoto Castle , originally known as Fukashi Castle, is one of Japan's premier historic castles, along with Himeji and Kumamoto. The building is also known as the due to its black exterior. It was the seat of Matsumoto Domain under the Edo Period Tokugawa ...
, a Japanese Castle in
Nagano Prefecture is a landlocked prefecture of Japan located in the Chūbu region of Honshū. Nagano Prefecture has a population of 2,052,493 () and has a geographic area of . Nagano Prefecture borders Niigata Prefecture to the north, Gunma Prefecture to the ...
Image:Bodiam-castle-10My8-1197.jpg,
Bodiam Castle Bodiam Castle () is a 14th-century moated castle near Robertsbridge in East Sussex, England. It was built in 1385 by Sir Edward Dalyngrigge, a former knight of Edward III, with the permission of Richard II, ostensibly to defend the area again ...
, a 14th-century castle near Robertsbridge in
East Sussex East Sussex is a ceremonial and non-metropolitan county in South East England on the English Channel coast. It is bordered by Kent to the north and east, West Sussex to the west, and Surrey to the north-west. The largest settlement in East ...
, England Image:Caerlaverock Castle from the air.jpg,
Caerlaverock Castle Caerlaverock Castle is a moated triangular castle first built in the 13th century. It is located on the southern coast of Scotland, south of Dumfries, on the edge of the Caerlaverock National Nature Reserve. Caerlaverock was a stronghold of ...
, a 13th-century castle in southern Scotland Image:Sunset of the Forbidden City 2006.JPG, The Forbidden City,
Beijing } Beijing ( ; ; ), Chinese postal romanization, alternatively romanized as Peking ( ), is the Capital city, capital of the China, People's Republic of China. It is the center of power and development of the country. Beijing is the world's Li ...
: North-western angle Image: Angkor-Wat-from-the-air.JPG,
Angkor Wat Angkor Wat (; km, អង្គរវត្ត, "City/Capital of Temples") is a temple complex in Cambodia and is the largest religious monument in the world, on a site measuring . Originally constructed as a Hindu temple dedicated to the g ...
,
Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand ...
Image:Egeskov Slot 08.jpg, Egeskov Castle,
Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of Denmark , establish ...
Image:LissingenEugenBracht1880BurgLissingen.jpg, Castle of Lissingen Image:Sigiriya moat 2011.jpg,
Sigiriya Sigiriya or Sinhagiri (''Lion Rock'' si, සීගිරිය, ta, சிகிரியா/சிங்ககிரி, pronounced see-gi-ri-yə) is an ancient rock fortress located in the northern Matale District near the town of Dambulla ...
moat,
Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...
File:Qufu City Wall - south of the west gate - looking S - P1050985.JPG, Frozen moat of the walled city of Qufu, China Image:Fortbourtange.jpg, Fort Bourtange, a late 16th-century
star fort A bastion fort or ''trace italienne'' (a phrase derived from non-standard French, literally meaning ''Italian outline'') is a fortification in a style that evolved during the early modern period of gunpowder when the cannon came to domin ...
in Groningen,
Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...
Image:Fort Brockhurst 4-Gosport - geograph.org.uk - 693238.jpg, Fort Brockhurst a mid-19th-century polygonal fort in
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 ...
, England Image:Castello_esterno.jpg, The Castello Estense of
Ferrara Ferrara (, ; egl, Fràra ) is a city and ''comune'' in Emilia-Romagna, northern Italy, capital of the Province of Ferrara. it had 132,009 inhabitants. It is situated northeast of Bologna, on the Po di Volano, a branch channel of the main stream ...
, Italy Image:Fort-Jefferson Dry-Tortugas.jpg, Fort Jefferson, Dry Tortugas,
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and ...
Image:Moat Castle Steinfurt.jpg, Moat with civic houses bordering on it in Steinfurt Image:Beijing ancient city gate and moat.jpg,
Beijing } Beijing ( ; ; ), Chinese postal romanization, alternatively romanized as Peking ( ), is the Capital city, capital of the China, People's Republic of China. It is the center of power and development of the country. Beijing is the world's Li ...
ancient city gate and moat Image:Vellorefort.jpg, Vellore Fort Moat, in
Tamil Nadu Tamil Nadu (; , TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language ...
,
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...
File:Daalsesingel-Utrecht-2020.jpg, The ''Daalsesingel'', a part of the moat that surrounds the city center of
Utrecht Utrecht ( , , ) is the fourth-largest city and a municipality of the Netherlands, capital and most populous city of the province of Utrecht. It is located in the eastern corner of the Randstad conurbation, in the very centre of mainland Net ...
, Netherlands File:Hikone-Castle-canal-cherry-blossom-2018-Luka-Peternel.jpg, Hikone Castle moat File:Gate-of-Divine-Might-Forbidden-City-2018-Luka-Peternel.jpg,
Forbidden City The Forbidden City () is a palace complex in Dongcheng District, Beijing, China, at the center of the Imperial City of Beijing. It is surrounded by numerous opulent imperial gardens and temples including the Zhongshan Park, the sacrifi ...
moat File:Landskrona citadell från luften.jpg, Landskrona Citadel with mid 15th-century dual moat construction


Modern usage


Architectural usage

Dry moats were a key element used in French
Classicism Classicism, in the arts, refers generally to a high regard for a classical period, classical antiquity in the Western tradition, as setting standards for taste which the classicists seek to emulate. In its purest form, classicism is an aesthet ...
and
Beaux-Arts architecture Beaux-Arts architecture ( , ) was the academic architectural style taught at the École des Beaux-Arts in Paris, particularly from the 1830s to the end of the 19th century. It drew upon the principles of French neoclassicism, but also incorpo ...
dwellings, both as decorative designs and to provide discreet access for service. Excellent examples of these can be found in Newport, Rhode Island at
Miramar (mansion) Miramar is a French neoclassical-style mansion on bordering Bellevue Avenue on Aquidneck Island at Newport, Rhode Island. Overlooking Rhode Island Sound, it was intended as a summer home for the George D. Widener family of Philadelphia. History ...
and The Elms, as well as at Carolands, outside of San Francisco, California, and at Union Station in
Toronto Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anch ...
, Ontario, Canada. Additionally, a dry moat can allow light and fresh air to reach basement workspaces, as for example at the James Farley Post Office in
New York City New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the L ...
.


Anti-terrorist moats

Whilst moats are no longer a significant tool of warfare, modern architectural building design continues to use them as a defence against certain modern threats, such as terrorist attacks from
car bomb A car bomb, bus bomb, lorry bomb, or truck bomb, also known as a vehicle-borne improvised explosive device (VBIED), is an improvised explosive device designed to be detonated in an automobile or other vehicles. Car bombs can be roughly divided ...
s and armoured fighting vehicles. For example, the new location of the
Embassy of the United States in London The Embassy of the United States of America in London is the diplomatic mission of the United States in the United Kingdom. It is located in Nine Elms and is the largest American embassy in Western Europe and the focal point for events rela ...
, opened in 2018, includes a moat among its security features - the first moat built in England for more than a century. Modern moats may also be used for aesthetic or ergonomic purposes. The Catawba Nuclear Station has a concrete moat around some of the plant. (Other sides of the plant are bordering a lake.) The moat is a part of precautions added to such sites after the
September 11, 2001 attacks The September 11 attacks, commonly known as 9/11, were four coordinated suicide terrorist attacks carried out by al-Qaeda against the United States on Tuesday, September 11, 2001. That morning, nineteen terrorists hijacked four commer ...
.


Safety moats

Moats, rather than fences, separate animals from spectators in many modern
zoo A zoo (short for zoological garden; also called an animal park or menagerie) is a facility in which animals are kept within enclosures for public exhibition and often bred for conservation purposes. The term ''zoological garden'' refers to z ...
installations. Moats were first used in this way by
Carl Hagenbeck Carl Hagenbeck (10 June 1844 – 14 April 1913) was a German merchant of wild animals who supplied many European zoos, as well as P. T. Barnum. He created the modern zoo with animal enclosures without bars that were closer to their natural habi ...
at his Tierpark in
Hamburg Hamburg (, ; nds, label=Hamburg German, Low Saxon, Hamborg ), officially the Free and Hanseatic City of Hamburg (german: Freie und Hansestadt Hamburg; nds, label=Low Saxon, Friee un Hansestadt Hamborg),. is the List of cities in Germany by popul ...
, Germany. The structure, with a vertical outer retaining wall rising direct from the moat, is an extended usage of the
ha-ha A ha-ha (french: hâ-hâ or ), also known as a sunk fence, blind fence, ditch and fence, deer wall, or foss, is a recessed landscape design element that creates a vertical barrier (particularly on one side) while preserving an uninterrupted view ...
of English landscape gardening.


Border defence moats

In 2004 plans were suggested for a two-mile moat across the southern border of the
Gaza Strip The Gaza Strip (;The New Oxford Dictionary of English (1998) – p.761 "Gaza Strip /'gɑːzə/ a strip of territory under the control of the Palestinian National Authority and Hamas, on the SE Mediterranean coast including the town of Gaza.. ...
to prevent tunnelling from Egyptian territory to the border town of Rafah. In 2008 city officials in
Yuma, Arizona Yuma ( coc, Yuum) is a city in and the county seat of Yuma County, Arizona, United States. The city's population was 93,064 at the 2010 census, up from the 2000 census population of 77,515. Yuma is the principal city of the Yuma, Arizona, M ...
planned to dig out a two-mile stretch of a 180-hectare (440-acre) wetland known as Hunters Hole to control immigrants coming from Mexico.


Pest control moats

Researchers of jumping spiders, which have excellent vision and adaptable tactics, built water-filled miniature moats, too wide for the spiders to jump across. Some specimens were rewarded for jumping then swimming and others for swimming only. ''
Portia fimbriata ''Portia fimbriata'', sometimes called the fringed jumping spider, is a jumping spider (family Salticidae) found in Australia and Southeast Asia. Adult females have bodies 6.8 to 10.5 millimetres long, while those of adult males are 5.2 t ...
'' from
Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , establishe ...
generally succeeded, for whichever method they were rewarded. When specimens from two different populations of ''
Portia labiata ''Portia labiata'' is a jumping spider (family Salticidae) found in Sri Lanka, India, southern China, Burma (Myanmar), Malaysia, Singapore, Java, Sumatra and the Philippines. In this medium-sized jumping spider, the front part is orange-brown a ...
'' were set the same task, members of one population determined which method earned them a reward, whilst members of the other continued to use whichever method they tried first and did not try to adapt. As a basic method of pest control in
bonsai Bonsai ( ja, 盆栽, , tray planting, ) is the Japanese art of growing and training miniature trees in pots, developed from the traditional Chinese art form of '' penjing''. Unlike ''penjing'', which utilizes traditional techniques to produc ...
, a moat may be used to restrict access of crawling insects to the bonsai.


See also

*
Drawbridge A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat. In some forms of English, including American English, the word ''drawbridge'' commonly refers to all types of movea ...
*'' Gracht'' *
Ha-ha A ha-ha (french: hâ-hâ or ), also known as a sunk fence, blind fence, ditch and fence, deer wall, or foss, is a recessed landscape design element that creates a vertical barrier (particularly on one side) while preserving an uninterrupted view ...
wall * Moated settlements *
Moot hill A moot hill or ''mons placiti'' (statute hill) is a hill or mound historically used as an assembly or meeting place, as a moot hall is a meeting or assembly building, also traditionally to decide local issues. In early medieval Britain, such h ...
(sometimes written as Moat Hill) * Neck ditch


References


External links

{{Authority control Castle architecture Masonry Water