Moss Farm Road Stone Circle (or Machrie Moor 10) is the remains of a Bronze Age burial cairn, surrounded by a circle of stones. It is located near Machrie on the Isle of Arran in Scotland.
The cairn and stone circle is situated 3 miles north of Blackwaterfoot on the west side of the Isle of Arran. Around 1 kilometre to the east are the Machrie Moor Stone Circles, and this circle is sometimes known as Machrie Moor Circle 10.
The cairn has been robbed for stone, and a modern fence and a farm track have cut through the north side of the site. It was once surrounded by a complete circle of stones with a diameter of 23 metres, but many have been removed. The kerb now consists of seven upright stones, around 1 metre high with at least five more large stones now on edge.
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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.