The Romanesque part of the Church of Saints Peter and Paul is from around 1120. Next to the church stands as a remnant of the church fortifications an old bastion from 1278, which is transformed into a bell tower. The bell in the bell tower is from 1512. There is also one of the rarest Czech sights, the Načeradský Missal from the 13th 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.