Krevo Castle is one of the oldest Belarus castles and dates from the early 14th century. It is an important place in Belarus because it was the first all-stone castle to be built in the region. The stone walls were 2.5m thick and 13m high. The castle had two towers which guarded the rest of the fortress. Grand Duke Keistut was murdered in the castle in 1381, and in 1385 the famousKrevo Union (between Poland and the Grand Duchy of Lithuania) was signed here.
During the 16th century the Tatars and the Russians tried to capture the castle but it remained intact. By the early 19th century the castle was abandoned and the buildings were mostly destroyed during World War I. Today only the ruins of the castle remain. The perimeter walls can still be seen, but only a few fragments of the towers are still intact. There is a magnificent view of the ruins from the top of nearby Yuryeva Mountain.
Many legends surround the Krevo Castle ruins, including tales of an underground tunnel from the castle to Vilnius, and a beautiful princess who was bricked up alive in the castle walls. There is a pagan temple on Yuryeva Mountain and 1 of 4 amulet boulders, which used to lie at the entrance of Krevo to protect the town against trouble and disease, still remains.
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.