Torrylin Cairn is the remains of a Neolithic chambered tomb. The cairn has been interfered with by stone robbing and later dumping of field stones and its original shape and size are uncertain. The chamber is 6.7 metres long by about 1.2 metres wide with each compartment about 1.4 metres long. Torrylin Cairn is of a type found across south-west Scotland known as a Clyde cairn, of which a better preserved example can be found at Carn Ban, about 3 miles to the northeast. The tomb would probably have had a crescent-shaped forecourt, framed by a façade of slender upright stones.
Antiquarian excavations in the 19th century uncovered an elongated burial chamber, divided into four compartments. Only the innermost compartment was intact. It contained the remains of six adults, a child and an infant. Beside them lay a flint tool and a fragment of pottery.
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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.