St. Jadwiga's Church in Brzeg is a Gothic castle church. The Gothic brick-built chapel, adjoined to the south-western portion of Brzeg Castle was built in the former location of a collegiate church built between 1368 and 1369. In 1741, the chapel was destroyed due to Prussian bombardment, with only the presbytery having had survived. After its reconstruction in 1783-1784, the chapel served as the mausoleum for the Silesian Piasts (after 1945, 22 sarcophagi were found in the crypt). The chapel suffered damage during World War II, and was reconsecrated as a church in 1989.
Presently, the sarcophagi are located in the adjoined Silesian Piasts Brzeg Castle Museum.
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.