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Arrow Slit
An arrowslit (often also referred to as an arrow loop, loophole or loop hole, and sometimes a balistraria) is a narrow vertical aperture in a fortification through which an archer can launch arrows or a crossbowman can launch bolts. The interior walls behind an arrow loop are often cut away at an oblique angle so that the archer has a wide field of view and field of fire. Arrow slits come in a variety of forms. A common one is the cross, accommodating the use of both the longbow and the crossbow. The narrow vertical aperture permits the archer large degrees of freedom to vary the elevation and direction of their bowshot but makes it difficult for attackers to harm the archer since there is only a small target at which to aim. Balistraria, plural ''balistrariae'' (from balister, crossbowman), can often be found in the curtain walls of medieval battlements beneath the crenellations. History The invention of the arrowslit is attributed to Archimedes during the siege of Syracus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrow Slat Corfe Castle
An arrow is a fin-stabilized projectile launched by a bow. A typical arrow usually consists of a long, stiff, straight shaft with a weighty (and usually sharp and pointed) arrowhead attached to the front end, multiple fin-like stabilizers called fletchings mounted near the rear, and a slot at the rear end called a nock for engaging the bowstring. A container or bag carrying additional arrows for convenient reloading is called a quiver. The use of bows and arrows by humans predates recorded history and is common to most cultures. A craftsman who makes arrows is a fletcher, and one who makes arrowheads is an arrowsmith.Paterson ''Encyclopaedia of Archery'' p. 56 History The oldest evidence of likely arrowheads, dating to years ago, were found in Sibudu Cave, current South Africa.Backwell L, d'Errico F, Wadley L.(2008). Middle Stone Age bone tools from the Howiesons Poort layers, Sibudu Cave, South Africa. Journal of Archaeological Science, 35:1566–1580. Backwell L, Brad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archimedes
Archimedes of Syracuse ( ; ) was an Ancient Greece, Ancient Greek Greek mathematics, mathematician, physicist, engineer, astronomer, and Invention, inventor from the ancient city of Syracuse, Sicily, Syracuse in History of Greek and Hellenistic Sicily, Sicily. Although few details of his life are known, based on his surviving work, he is considered one of the leading scientists in classical antiquity, and one of the greatest mathematicians of all time. Archimedes anticipated modern calculus and mathematical analysis, analysis by applying the concept of the Cavalieri's principle, infinitesimals and the method of exhaustion to derive and rigorously prove many geometry, geometrical theorem, theorems, including the area of a circle, the surface area and volume of a sphere, the area of an ellipse, the area under a parabola, the volume of a segment of a paraboloid of revolution, the volume of a segment of a hyperboloid of revolution, and the area of a spiral. Archimedes' other math ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loophole (firearm)
A loophole is a protected small opening, which allows a firearm to be aimed and discharged, while providing cover and concealment for the rifleman. To prevent detection, the rifle's muzzle should not protrude through the loophole, particularly at night to hide the muzzle flash. Arrowslit The precursor to the loophole for firearms was the arrowslit, which is a narrow aperture in a fortification for an archer to launch arrows or an arbalist to launch crossbow bolts. The earliest use of the arrowslit was alleged to have been by Archimedes during the siege of Syracuse in 214–212 BC. Arrowslits were used in ancient Greek warfare and by the military of ancient Rome. There was a reintroduction of arrowslits during the medieval warfare period at Dover Castle and Framlingham Castle in England and by Richard the Lionheart at Château Gaillard in France. First World War During the First World War, the static movement of trench warfare and a need for protection from snip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunpowder
Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, charcoal (which is mostly carbon), and potassium nitrate, potassium nitrate (saltpeter). The sulfur and charcoal act as fuels while the saltpeter is an oxidizer. Gunpowder has been widely used as a propellant in firearms, artillery, rocketry, and pyrotechnics, including use as a blasting agent for explosives in quarrying, mining, building Pipeline transport, pipelines, tunnels, and road#Construction, roads. Gunpowder is classified as a Explosive#Low, low explosive because of its relatively slow decomposition rate, low ignition temperature and consequently low brisance, brisance (breaking/shattering). Low explosives deflagration, deflagrate (i.e., burn at subsonic speeds), whereas high explosives detonation, detonate, producing a supersonic shockwave. Ignition of gunpowder packed behind a projectile generates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slighting
Slighting is the deliberate damage of high-status buildings to reduce their value as military, administrative, or social structures. This destruction of property is sometimes extended to the contents of buildings and the surrounding landscape. It is a phenomenon with complex motivations and was often used as a tool of control. Slighting spanned cultures and periods, with especially well-known examples from the English Civil War in the 17th century. Meaning and use Slighting is the act of deliberately damaging a high-status building, especially a castle or fortification, which could include its contents and the surrounding area. The first recorded use of the word ''slighting'' to mean a form of destruction was in 1613. Castles are complex structures combining military, social, and administrative uses, and the decision to slight them took these various roles into account. The purpose of slighting was to reduce the value of the building, whether military, social, or administrative. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Château Gaillard
Château Gaillard () is a medieval castle ruin overlooking the River Seine above the commune of Les Andelys, in the French department of Eure, in Normandy. It is located some north-west of Paris and from Rouen. Construction began in 1196 under the auspices of Richard the Lionheart, who was simultaneously King of England and feudal Duke of Normandy. The castle was expensive to build, but the majority of the work was done in an unusually short period of time. It took just two years and, at the same time, the town of Petit Andely was constructed. Château Gaillard has a complex and advanced design, and uses early principles of concentric fortification; it was also one of the earliest European castles to use machicolations. The castle consists of three enclosures separated by dry moats, with a keep in the inner enclosure. Château Gaillard was captured in 1204 by the king of France, Philip II, after a lengthy siege. In the mid-14th century, the castle was the residence of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard I Of England
Richard I (8 September 1157 – 6 April 1199), known as Richard the Lionheart or Richard Cœur de Lion () because of his reputation as a great military leader and warrior, was King of England from 1189 until his death in 1199. He also ruled as Duke of Normandy, Duke of Aquitaine, Aquitaine, and Duchy of Gascony, Gascony; Lord of Cyprus in the Middle Ages, Cyprus; Count of Poitiers, Counts and dukes of Anjou, Anjou, Count of Maine, Maine, and Count of Nantes, Nantes; and was overlord of Brittany at various times during the same period. He was the third of five sons of Henry II of England and Eleanor of Aquitaine and was therefore not expected to become king, but his two elder brothers predeceased their father. By the age of 16, Richard had taken command of his own army, putting down rebellions in Poitou against his father. Richard was an important Christian commander during the Third Crusade, leading the campaign after the departure of Philip II of France and achieving sev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Framlingham Castle
Framlingham Castle is a castle in the market town of Framlingham, Suffolk, England. An early motte and bailey or ringwork Norman castle was built on the Framlingham site by 1148, but this was destroyed (Slighting, slighted) by Henry II of England in the aftermath of the Revolt of 1173–1174. Its replacement, constructed by Roger Bigod, 2nd Earl of Norfolk, Roger Bigod, the Earl of Norfolk, was unusual for the time in having no central keep, but instead using a Curtain wall (fortification), curtain wall with thirteen mural towers to defend the centre of the castle. Despite this, the castle was successfully taken by King John of England, John in 1216 after a short siege. By the end of the 13th century, Framlingham had become a luxurious home, surrounded by extensive medieval deer park, parkland used for hunting. During the 15th and 16th centuries Framlingham was at the heart of the estates of the powerful House of Mowbray, Mowbray and House of Howard, Howard families. Two artifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 writers say it is the largest castle in England, a title also claimed by Windsor Castle. History Iron age This site may have been fortified with earthworks in the Iron Age or earlier, before the Roman conquest of Britain, Romans invaded in AD 43. This is suggested on the basis of the unusual pattern of the earthworks which does not seem to be a perfect fit for the medieval castle. Excavations have provided evidence of Iron Age occupation within the locality of the castle, but it is not certain whether this is associated with the hillfort. Roman era The site also contains one of Dover's two Dubris#Lighthouses, Roman lighthouses one of only three surviving Roman-era lighthouses in the world, and the tallest and most complete standing Roman structure in Engla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castle
A castle is a type of fortification, fortified structure built during the Middle Ages predominantly by the nobility or royalty and by Military order (monastic society), military orders. Scholars usually consider a ''castle'' to be the private fortified house, fortified residence of a lord or noble. This is distinct from a mansion, palace, and villa, whose main purpose was exclusively for ''pleasance'' and are not primarily fortresses but may be fortified. Use of the term has varied over time and, sometimes, has also been applied to structures such as hill forts and 19th- and 20th-century homes built to resemble castles. Over the Middle Ages, when genuine castles were built, they took on a great many forms with many different features, although some, such as curtain wall (fortification), curtain walls, arrowslits, and portcullises, were commonplace. European-style castles originated in the 9th and 10th centuries after the fall of the Carolingian Empire, which resulted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City Wall
A defensive wall is a fortification usually used to protect a city, town or other settlement from potential aggressors. The walls can range from simple palisades or Earthworks (military), earthworks to extensive military fortifications such as curtain wall (fortification), curtain walls with Fortified tower, towers, bastions and gates for access to the city. From ancient to modern times, they were used to enclose settlements. Generally, these are referred to as city walls or town walls, although there were also walls, such as the Great Wall of China, Walls of Benin, Hadrian's Wall, Anastasian Wall, and the Atlantic Wall, which extended far beyond the borders of a city and were used to enclose regions or mark territorial boundaries. In mountainous terrain, defensive walls such as ''letzis'' were used in combination with castles to seal valleys from potential attack. Beyond their defensive utility, many walls also had important symbolic functions representing the status and indepen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scorpion (siege Engine)
The ''scorpio'' or scorpion was a type of Roman torsion siege engine and field artillery piece. It was described in detail by the early-imperial Roman architect and engineer Vitruvius in the 1st century BC and by the 4th century AD officer and historian Ammianus Marcellinus.Ammianus Marcellinus, Roman History' Design Two versions are known: a horizontal two-armed variety like a ballista and a one-armed, vertical version otherwise referred to as an ''onager''. The scorpion was made of a ground frame made of two beams joined together with crossbeams. Spring holes were drilled into the sides of the beams to allow for ropes to be placed in, thus allowing them to serve as sinew-springs. This gave the weapon more power. An arm made of wood known as the ''stilus'', with iron hooks at the end, was used to hold the stone or bolt which was to be fired. The fourth century army officer and historian Ammianus Marcellinus witnessed the use of ''scorpiones'' during several engagements in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
