Leicester's Church, originally known as St David's Church, is a large ruined church near to the hill top castle at Denbigh, North Wales. It was built for Robert Dudley, 1st Earl of Leicester, from 1578, but financial difficulties meant work stopped in 1584. When the Earl died unexpectedly in 1588 the project was abandoned. It had been the only large church-building project in Elizabethan England or Wales. On Robert Dudley's death with no heir, his estates reverted to the Crown, as a roofless enclosed space. It is now a Grade I listed building and Scheduled Ancient Monument, cared for by Cadw, the Welsh historic environment service.
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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.