San Francisco Church was rebuilt in the 14th century on an earlier 13th-century structure. It has a floor plan in the shape of a Latin cross, a single nave, chapels in the apse and a gabled roof. The outside is arranged in staggered heights, with three windows at the top. The main doorway is a pointed arch, and the archivolts are decorated with plant and geometric motifs. The tympanum has a representation of the Adoration of the Kings and Saint Francis receiving the stigmata on Mount Alvernia. At the east end of the church is the sarcophagus of Fernán Pérez de Andrade.
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.