The Castello Visconteo di Pagazzano is a moated, late-medieval castle which originates from the 11th century. It was burned down and 200 inhabitants were killed in a battle in 1353. The castle and the territory of Gera d’Adda, including Pagazzano, was inherited in 1354 by Bernabò Visconti. The territory was disputed over the centuries by surrounding ruling forces, and various Visconti descendants. In the 19th century, the castle was owned by the Crivelli family until 1968 when it was bought by a private initiative, and sold to the Comune di Pagazzano in the year 2000.
The structure has been built with bricks and is rectangular in shape. The southern part has lost the towers at the south-east and south-west corners. In 1553 Galeazzo Visconti ordered the integration of the mansion into the castle. The drawbridge still exists and is used as pedestrian passage, the castle is also surrounded by a moat full of water. The drawbridge is on the northern side and is about 4 metres long, it still works today. The main entrance is also here, situated in the majestic central tower. The defensive use of this central tower depended on a system of battlements. Along the walls there is a look out tower where a bell rang, so the people could take refuge inside the walls in case of danger. The oldest part includes huge rooms and the dungeons.
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.