San Benito de Alcántara is a monastery in Alcántara. After the Christian conquest of Alcántara in 1213, the city was given to the military Order of Calatrava four years later. In 1218, they in turn ceded it to the order of San Julián de Pereiro, which changed its name to that of the military Order of Alcántara. In 1488, the order's council decided to build a new monastery in the city. Construction began in 1505 and lasted for most of the 16th century. The order's main architect, Pedro de Ybarra, worked on the design.
In 1706, it was sacked during the War of Spanish Succession, and it was damaged by the 1755 Lisbon earthquake. In 1835, it was abandoned and began to fall into ruin. Later it was acquired by Hidroeléctrica Española, which restored it and occupied the structure until 1966. In 1985 it went to the Fundación San Benito de Alcántara.
The exterior's main feature are the three apses (the central polygonal and the side ones semicircular), characterized by large coat of arms. Opposite a three-storey loggia with Renaissance arches, a semicircular auditorium has been built; the classical theatre festival of Alcantara is held here in the summer.
The interior has a nave and two aisles. The cloister, in Gothic-style, has a square plan with two floors. It was built atop an Moorish fortress.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.