The walls which enclose the town of Moniga del Garda were built in the 10th century to face the Hungarian invasions. The castle was founded in the same period and is still in fairly good condition. Rectangular in shape (60 × 80), there is only one entrance at the centre of the eastern wall, where signs of an old drawbridge can still be seen. The crenulated city walls have four small round lookout towers on each corner. Three more towers are situated at the centre of the north, south and west walls. The square keep is now a bell tower.
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.