Brønshøj Church was built in the 1180s by Bishop Absalon, who is regarded as the founder of Copenhagen. This makes the Church the oldest intact building in Copenhagen. Originally dedicated to Saint Lawrence, Brønshøj Church is first mentioned in two papal briefs of 21 October 1186 and 25 March 1193. Limestone from Stevns Klint was used to build the Romanesque-style nave and choir. The red-brick Gothic tower was added in the 1400s. The porch was added in 1892, while the north-facing vestry was not added until 1942.
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.