Santa Lucía del Trampal is a monastic church, one of the few surviving Visigothic buildings. Apparently, the basilica was built toward the end of the 7th century as part of a convent pertaining to the Templar monks, for which it served as a chapel, with a single nave and three chapels in the chancel. Along with the transept, the chancel is the truly Visigothic part, built upon perfectly-angled dressed stone. The main body of the church is believed to have been built around the 14th or 15th century.
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.