Soria pro-Cathedral was built in the 12th century on the site of an old Augustine monastery, and was subsequently rebuilt in the 16th century in Renaissance style under the patronage of Bishop Acosta. The church has an open plan with three naves of equal heights, covered by vaults with star-shaped skylights. It has quite austere décor, both inside and out, except the south doorway, which is in Plateresque style, with a round arch with archivolts and a high frieze. It still conserves its 12th century Romanesque cloister.
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.