Certosa di San Giacomo is a Carthusian monastery on the island of Capri. Count Giacomo Arcucci, a secretary to Joan I of Naples, established the charterhouse in 1371. He later became a monk himself in 1386. In 1553 the monastery was restored and fortified and a tower was erected which collapsed in the 18th century.
There was often conflict between the islanders and the monks, who owned land as well as grazing and hunting rights. During the 1656 plague in Capri, the monks sealed themselves off, whereupon the islanders threw their corpses over the wall of the monastery in retribution.
Since 1974 the charterhouse houses the Karl Wilhelm Diefenbach museum among others and is used for cultural events. A high school is also on the premises.
The charterhouse has three main areas: the pharmacy and women's church, the buildings for monks, and those for guests. The cloister (Chiostro Grande) is of a late Renaissance design, while the Chiostro Piccolo features Roman marble columns.
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.