The Tihany Abbey is a Benedictine monastery established at Tihany in the Kingdom of Hungary in 1055 by King Andrew I of Hungary. Its patrons are the Virgin Mary and Saint Aignan of Orleans. King Andrew was buried in the church of the monastery in 1060. His tomb in the crypt of the church is only grave of a medieval King of Hungary which has been preserved until now. The church's ceiling is decorated with frescoes by Károly Lotz, depicting Faith, Hope and Love.
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.