On the site of the current Visconti-Castelbarco Castle, a fortification had been existing at least since the 10th century. At the end of the 13th century the castle became a property of the Visconti of Milan. It was then inherited by a lineage originated by Uberto, brother of Matteo Lord of Milan, initially the Visconti di Somma and later the Visconti di Cislago.
Destroyed in the 17th century, it was raised again in the form of a baroque villa on the original U-shaped plan and with two towers at the corners of the main facade. A crenellated roof was added to the building, providing the current revival castle aspect.
The castle belonged to the Visconti di Cislago until the 18th century. The marriage of the last female member of the Visconti di Cislago to a Castelbarco led the castle in the hands of the bridegroom's family. Their descendants assumed the surname of Castelbarco-Visconti.
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.