Church of Our Lady of Angels is a 1770 Baroque structure built on the remains of an earlier Romanesque church. It features Baroque altars and paintings, among which the most valuable are the 18th century Immaculate Conception by St. Peter by Jacopo Marieschi and Moses with the Serpent of Brass by Venetian painter Gaspare Vecchio, originally from the Poreč Cathedral.
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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.