Bremen Town hall was built between 1405 and 1410 and the Weser Renaissance facade added in the 17th century. The Town Hall and the statue of Roland on the marketplace are outstanding representations of civic autonomy and sovereignty, as these developed in the Holy Roman Empire in Europe. The old town hall was built in the Gothic style in the early 15th century, after Bremen joined the Hanseatic League. The building was renovated in the so-called Weser Renaissance style in the early 17th century. A new town hall was built next to the old one in the early 20th century as part of an ensemble that survived bombardment during the Second World War.
The stone statue of Roland was initially erected in 1404 in representation of the rights and privileges of the free and imperial city of Bremen. The statue of Roland is associated with the Margrave of Brittany, a paladin of Charlemagne.
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.