The Mission of San Juan Capistrano is one of several Spanish missions in California built for the purpose of converting people to the Catholic faith. Established in 1776 it was the largest Spanish building in California. Unfortunately it was partly destroyed by an earthquake in 1812 and gradually fell into disuse. However it was revived in the 20th century and is now once more a flourishing ministry.
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.