- Arrowslit
Image Arrow slat corfe castle.jpg thumb An arrowslit at Corfe Castle . This shows the side the archer would have stood on. An arrowslit often also referred to as an arrow loop or loop hole , and sometimes a balistraria is a thin vertical aperture in a fortification through which an archery archer can launch arrow s. 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 weaponry field of fire . Arrow slits come in a remarkable variety. A common and recognizable form is the cross . The thin vertical aperture permits the archer large degrees of freedom to vary the elevation ballistics elevation and direction of his bowshot but makes it difficult for attackers to harm the archer since there is only a small target to aim at. Balistraria can often be found in the Curtain wall fortification curtain walls of medieval battlements beneath the crenellations . History The invention of the arrowslit is attributed to Archimedes during the Siege of Syracuse 214 212 BC siege of Syracuse in 214 212 BC. Slits of the height of a man and about a palm s width on the outside allowed defenders to shoot bows and scorpion siege engine scorpions an ancient siege engine from within the city wall s. ref name Jones & Renn 445 harvnb Jones Renn 1982 p 445 . ref Although used in late Greek and Roman defences, arrowslits were not present in early Norman castle s. They are only reintroduced to military architecture towards the end of the 12th century, with the castles of Dover Castle Dover and Framlingham Castle Framlingham in England, and Richard I of England Richard the Lionheart s Ch teau Gaillard in France. In these early examples, arrowslits were positioned to protect sections of the castle wall, rather than all sides of the castle. In the 13th century, it became common for arrowslits to be placed all around a castle s defences. ref name Jones & Renn 445 Design In its simplest form, an arrowslit was a t ... more details
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- Podbrezje
shaped and were built on two levels with a roofed walkway, balistraria and a defence tower ... more details
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- Genoese tower
with it a single space of life the guardroom, on the second floor pierced with balistraria s to allow ... more details
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- Kielder Viaduct
Infobox bridge bridge name Kielder Viaduct native name image Kielder viaduct 1 .jpg image size 250px alt caption Kielder skew viaduct, built to carry the Border Counties Railway over Deadwater Burn official name carries Footpath crosses Deadwater Burn locale Kielder, Northumberland maint id designer John Furness Tone design Skew viaduct material Stone spans 7 pierswater 3 mainspan Seven spans of convert 40 ft m length convert 392 ft m width height load clearance below traffic begin 1858 complete 1862 open preceded followed heritage collapsed closed toll map cue map image map alt map text map width coordinates coord 55 13.47 N 2 34.78 W region GB type landmark display inline,title lat long extra Kielder Viaduct consists of seven semi circular masonry skew arch es and was built in 1862 to carry the North British Railway across marshy land, which following flooding to create Kielder Water , became the place where Deadwater Burn joins Bakethin Reservoir . ref name geograph cite web url http www.geograph.org.uk photo 817633 title NY6392 Kielder Viaduct author Peter McDermott publisher Geograph accessdate 24 August 2009 ref Now closed to rail traffic, the bridge is currently used as a footpath. History Image Kielder viaduct 2 .jpg thumb 250px left Kielder Viaduct, spandrel detail Image Kielder viaduct 3 .jpg thumb 250px left Kielder Viaduct, information plaque The viaduct was conceived in a joint project of the Border Counties Railway and the North British Railway as part of the former s extension to Riccarton Junction. The project was completed in 1862 but the Border Counties Railway had been absorbed by the North British Railway two years earlier. In order to meet with the approval of local landowner the Duke of Northumberland who had a shooting lodge nearby, the viaduct was built in a Scots baronial style Baronial style and decorated with a battlemented parapet and faux Balistraria arrow slits . ref name rennison cite book title Civil Engineering Heritage Northern Engl ... more details
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- Qasr Kharana
does not suggest a military use, and slits in its wall could not have been designed as balistraria ... more details
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- Celje Castle
era balistraria . Holy Roman Empire The first imperial caretaker, Kri tof pl. Ungnad, was named ... more details
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- Image projector
pinhole camera effect caused by balistraria s in the Three Castles of Bellinzona Castelgrande in Bellinzona ... more details
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- Pinhole camera
als Lochkamera.JPG thumb Ancient pinhole camera effect caused by balistraria s in the Three Castles ... more details
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- Fortifications of Brussels
the main wall, which had a number of Balistraria arrow slits in it. A second arcade architecture ... more details
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- Bessan
niches which is accessed by a walk. Two walls with balistraria s and a spiral staircase that starts ... more details
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