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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 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]
Amsterdam's 22 bastions cost 11 million florins, and Siena in 1544 bankrupted itself to pay for its defences. For this reason, bastion forts were often improvised from earlier defences. Medieval curtain walls were torn down, and a ditch was dug in front of them. The earth used from the excavation was piled behind the walls to create a solid ...
Porta Reale Curtain, also known as St. James Curtain – the curtain wall linking St. John's and St. James Bastions. The city's main gate is located within the curtain wall. [37] The gate was rebuilt five times, with the present one being constructed between 2011 and 2014 to a design by Renzo Piano. St. James Counterguard
The curtain wall itself, however, is not ordinarily required to have a rating. This causes a quandary as compartmentalization (fire protection) is typically based upon closed compartments to avoid fire and smoke migrations beyond each engaged compartment. A curtain wall by its very nature prevents the completion of the compartment (or envelope).
The Real Cittadella was a pentagonal star fort, and was typical example of 17th century military architecture. It had five corner bastions (named Norimberga, San Francesco, San Carlo, San Stefano and San Diego), which were linked by curtain walls. A cavalier was located on each bastion.
The bastioned enclosure is composed of several defensive buildings such as the curtain wall of the defensive walls, the gates, designed to allow and control the entry and exit of the inhabitants, the bastions consisting of pentagonal constructions, which join two consecutive lines of defensive wall on the inner side of the pentagon, the forts ...
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 to extensive military fortifications such as curtain walls with towers, bastions and gates for access to the city. [1]