Yelizarov or Yeleazarov Convent is a small convent founded as a monastery in 1447 by a local peasant named Eleazar. He constructed the wooden church of Three Holy Fathers, wherein he was interred upon his death on 15 May 1481. Eleazar was canonized at the Stoglavy Sobor in 1551.
In the mid-16th century, the monastery was heavily fortified and attained a position of great importance and celebrity, owing to its learned hegumen, Philotheus of Pskov, who is credited with authorship of the Legend of the White Cowl and the Third Rome prophecy. It was during his hegumenship that the monastery became known for its school of icon-painters and its still-standing cathedral was built. Some scholars believe that the only known copy of the Lay of Igor's Campaign was created by one of local monks at the behest of Philotheus.
After seven decades of Soviet neglect, the monastery was revived as a nunnery patronized by Lyudmila Putina and Lyubov Sliska who commissioned a luxurious guest house for their prolonged stays at the convent.
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.