The Roman estate of Büßlingen is a restored and reconstructed villa rustica ( Roman estate) from the first century AD, which existed until at least the third century.
The complex comprises nine excavated buildings on an area of 5.4 hectares. It is located south-southeast of Büßlingen, a district of Tengen in the Baden-Württemberg district of Konstanz in Germany. After the Villa rustica von Meßkirch , it is the largest known courtyard complex of its kind in southern Germany and also the only one whose buildings, determined by aerial archeology, have been completely excavated. Today it is an open-air museum.
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.