Acaya Castle wa built by the Knight Alfonso of Acaya in around 1506. In the following years, his son Gian Giacomo dell'Acaya, a famous architect, rebuilt the entire complex, transforming it into a fortified hamlet and making it the main centre of his estate. He also renamed it Acaya. After his death in 1570, the hamlet was sold and Acaya began to decline slowly, until its rebirth in the 20th century.
The Castle, which has a trapezoidal base, is accessible through a single bridge. The fortified walls are reinforced by two cylindrical towers. A stairway leads up to the rooms on the upper floor, including the bastion hall, with its painting of the Spanish Kings' coats of arms, and a room decorated with classically-styled motifs carved in Lecce stone.
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.