In the 15th-16th century the settlement of Keila consisted some tens of buildings and a hundred people formed around the church. At the same time the Livonian Order built a small fort south-east of the church on Jõepark. During the Livonian War of 1558-1583 the settlement was destroyed.Further hampered by the plague and starvation in 1601-1602 the population declination reduced the community to a small church village. Ruins of the fort were first excavated in 1976 with continued finds up to 2007.
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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.