Auchans Castle is a mock military mansion, Category A listed, T-plan building of a late 16th-century date converted to the L-plan during the early-to-mid-17th century; its ruins stand about 1 km of Dundonald, South Ayrshire. It was held at various times by the Wallace, Cochrane and Montgomerie families.
The now greatly ruined castle stands in its woodland policies amidst a series of stone-walled parks, the walls of which are mainly in a state of collapse. The building and the park walls were in the main constructed using stone robbed from Dundonald Castle. A vast number of valuable Eglinton family papers were discovered in one of the apartments in the 1880s, rescued as the building was in a terminal state of decay. Many had already been destroyed through neglect.
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.