Palazzo delle Albere is a Renaissance villa-fortress in Trento. It was built during the 16th century by the Madruzzo family of prince-bishops of Trento. It has a square plan, with four square, 6 m-wide and 20 m tall corner towers, surrounded by a ditch.
In the Great Hall, on the second floor, were once frescoes celebrating emperor Charles V's deeds. Still visible are instead the depictions of the 12 months. The third floor has also kept numerous Renaissance frescoes, depicting imaginary landscapes with ruins and castles, as well as the seven Liberal arts, the four Cardinal virtues and the three Theological virtues.
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.