The Breno castle rises on a hill overlooking the town: the building was erected in the 12th century, then turned into a military stronghold at the time of the Venetian Republic (1400-1500) and finally, after being abandoned in 1598, it was reused as a stone quarry.
The castle however rises on a much more ancient site: probably the place where in the 10th-9th century BCE a prehistoric community settled.
You can reach the castle with a short walk (about 15 minutes) from the centre of Breno: the perimeter is closed by a battlemented boundary wall and by two towers. Inside you can admire the remains of the St. Michele church, of Longobard origin, then enlarged in the Romanesque period. The other buildings, the only remains of which are mostly the outside walls and the cellars with barrel vaults, were added during the Venetian reign.
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.