The Church of St Martin was begun in the 12th century, although most of the current structure dates from the 13th century. The church is most notable for its extreme tilt, caused as a result of a landslide. This has led to many attempts to strengthen the church and prevent its collapse, through the use of massive tie beams and buttresses.
The church is in the Gothic style, and has a chancel, nave, south porch, and western tower. A round-headed north window dates to the 12th century, and the nave roof has been dated to the late 13th or early 14th century.
In the nave of the church stands a stone cross, sometimes referred to as a wayside cross or crucifix, dated to the 11th or 12th century. In the Middle Ages the cross, which bears a rare carving of Christ on the cross, would have stood in the churchyard to be venerated by pilgrims travelling through the Black Mountains, via Llanthony Abbey, to St David's Cathedral in Pembrokeshire.
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.