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The horseshoe-shaped (or D-shaped) tower is a compromise that gives the best of a round and a square tower. The semicircular side (the one facing the attacker) could resist siege engines, while the rectangular part at the back gives internal space and a large fighting platform on top. [ 1 ]
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]
Castillo de San Buenaventura is a defense tower located in Caleta de Fuste, a small town on the island of Fuerteventura, Canary Islands, Spain. It is also known as "Castillo de Caleta de Fuste", and the tower was recognized as historic-artistic monument in 1949.
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.
Motte-and-bailey was the prevalent form of castle during 11th and 12th centuries. A courtyard (called a bailey) was protected by a ditch and a palisade (strong timber fence). Often the entrance was protected by a lifting bridge, a drawbridge or a timber gate tower. Inside the bailey were stables, workshops, and a chapel.
1960s and 1970s Egyptian Defensive fortifications built by Egyptian Armed forces during the Attrition war on the Western bank of Suez Canal and Bar Lev Line of fortifications on Eastern side of Suez Canal (by Israel occupation forces).
Defensive walls were built in 1750 to defend the settlement of Halifax (present day downtown Halifax). Five forts were also built around the city's defensive walls, including the predecessor to Fort George. [2] The walls were taken down in the 1760s. [2] Louisbourg, Nova Scotia: Demolished (1760) Partially rebuilt (1960s)
Castillo San Felipe del Morro, Puerto Rico.The fortress and walled city of Old San Juan are a UNESCO World Heritage Site.. A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime.