St. Paul's Chapter Church was built by Bishop Burchard (who also built the first Worms Cathedral) in 1002. It was originally a three-naved buttress basilica.
A Dominican monastery was added in 1226. Also in the 13th century, the stone dome-shaped tower roofs were added in the Byzantine style of Jerusalem's churches. These make the church a visible monument to the Crusades.
The Pauluskirche was desconsecrated and the monastery destroyed in 1797 in the interests of secularization. In the decades that followed, the church was used as a warehouse, a barn and finally as a municipal museum (1880).
In 1929, Dominican religious life began again here and is still an active community. The resident monks conduct services, prayers and confession, and some also work as hospital or prison chaplains. The Pauluskirche was badly damaged by bombing on February 21, 1945, but through the support of local citizens it was rebuilt and back in service in 1947.
The present nave of the Pauluskirche was rebuilt in the Baroque era, but the remainder of the building is 11th-century Romanesque.
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.