The Hanseatic League was a commercial and defensive confederation of merchant guilds and their market towns. Growing from a few North German towns in the late 1100s, the league came to dominate Baltic maritime trade for three centuries. The golden age left many beautiful buildings to the Northern Germany, most of them representing Brick Gothic style.
One of the most picturesque places in Rostock is the Neuer Markt (New Market Square), with the Town Hall - that was originally built in the 13th century in Brick Gothic style, but extensively transformed in the 18th century, with the addition of a Baroque façade and a banqueting hall. The square also preserved six original, carefully restored gable houses from the 15th and 16th centuries. The other historical houses in Hanseatic style that once bordered the square were destroyed in an Allied air-raid in 1942, and rebuilt in a simplified manner.
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.