The Mirabello Castle is located in Mirabello di Pavia in the area of the Parco Visconteo. The building today is only a wing of the original castle, which was the seat of the Captain of the Park, the authority administering the Parco Visconteo on behalf of the Visconti family.
Since the 12th century the area had been occupied by a Cistercians monastery. In 1325 the Fiamberti family of Pavia acquired goods and lands in the area and between 1325 and 1341 they built the original castle. In the sixties of the fourteenth century, Galeazzo II Visconti acquired the castle from the Fiamberti. The castle was completed by the Visconti family and incorporated in the Parco Visconteo.
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.