St Catherine's Church is the oldest church in Gdańsk. The first record dates from 1185, when Prince Sobieslaw I built a wooden church. It was replaced with a stone church in 1227-1239. St. Catherine’s church evolved over centuries and only reached its final shape in the mid-15th century. It was a Protestant church from 1545 until 1945, after which it became a Roman Catholic church. There are several magnificent details in the church, like Anton Möller’s triptych painted in 1563-1611.
The tower was destroyed in 1945 in World War II, but rebuilt again in the following decades. Today the church hosts a Tower Clock 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.