Glenbuchat Castle is a historic Z plan Scottish castle built in 1590 for John Gordon of Cairnbarrow to mark his wedding. It is located above the River Don, near Kildrummy, Aberdeenshire. The building is roofless, but otherwise in fairly good repair.
The family sold the castle in 1738, and it remained in private hands until the 20th century. James William Barclay bought the castle in 1901, and Colonel James Barclay Milne, his grandson, placed it in state care in 1946. A local club purchased the surrounding parkland in 1948 and gave it to the state to ensure that the castle's surroundings would remain intact. Both the castle and the surrounding land are managed by Historic Scotland.
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.