Tingwall Church dates back to the 12th century, though not in its present form. Originally it was St Magnus Church, one of three steeple churches in Shetland. This building survived five to six hundred years, and part of this building may be seen in the burial crypt adjacent to the church. In charge of the Church, and indeed of all Christianity in Shetland, was the Archdeacon of Tingwall, an office that dates from 1215 AD, and lasted until the final establishment of Presbyterianism in Scotland in 1690 AD. The present building was opened for worship in November 1790, making it the second oldest church building currently in regular use in Shetland (the oldest being at Lunna).
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.