The Pettigarths Field Cairns is a Neolithic site containing upright stones and masonry. The south cairn is roughly 6 metres square, with an eastern entrance passage and circular chamber about 2 metres across. 4 metresbto the north is a round cairn, 4.5 metres in diameter, with a rectangular cist. The two cairns are located on a rise, about 140 metres northwest of Benie Hoose. The first archaeological explorations were carried out in 1936 and 1938. They were then inferred to be tombs belonging to the Late Stone Age and Early Bronze Age.
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.