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The outermost walls with their integrated bastions and wall towers together make up the enceinte or main defensive line enclosing the site. In medieval designs of castle and town, the curtain walls were often built to a considerable height and were fronted by a ditch or moat to make assault difficult.
A moat was a common addition to medieval fortifications, and the principal purpose was to simply increase the effective height of the walls and to prevent digging under the walls. In many instances, natural water paths were used as moats, and often extended through ditches to surround as much of the fortification as possible.
Medieval architecture was the art and science of designing and constructing buildings in the Middle Ages. The major styles of the period included pre-Romanesque , Romanesque , and Gothic . In the fifteenth century, architects began to favour classical forms again, in the Renaissance style , marking the end of the medieval period.
A bailey or ward in a fortification is a leveled courtyard, typically enclosed by a curtain wall. In particular, a medieval type of European castle is known as a motte-and-bailey. Castles and fortifications may have more than one bailey, and the enclosure wall building material may have been at first in wood, and later transitioned to stone ...
Several medieval town walls have survived into the modern age, such as the walled towns of Austria, walls of Tallinn, or the town walls of York and Canterbury in England, as well as Nordlingen, Dinkelsbühl and Rothenburg ob der Tauber in Germany. In Spain, Avila and Tossa del Mar hosts surviving medieval walls while Lugo has an intact Roman wall.
A keep and a protective wall would usually be built on top of the motte. Some walls would be large enough to have a wall-walk around them, and the outer walls of the motte and the wall-walk could be strengthened by filling in the gap between the wooden walls with earth and stones, allowing it to carry more weight; this was called a garillum. [15]
A bastion is a structure projecting outward from the curtain wall of a fortification, [1] most commonly angular in shape and positioned at the corners of the fort. The fully developed bastion consists of two faces and two flanks, with fire from the flanks being able to protect the curtain wall and the adjacent bastions. [2]
Scaling ladders may be unable to reach the top of the walls and are also more easily broken due to the bending stresses caused by the angle they are forced to adopt. Siege towers cannot approach closer than the base of the talus, and their gangplank may be unable to cover the horizontal span of the talus, rendering them useless.