The Ducal Rotunda of the Virgin Mary and St Catherine is Znojmo's most valuable monument, and features one of the oldest fresco in the Czech lands. Particular importance of this painting is that besides the religious motives it displays also the praising portrayal of the ruling Přemyslid dynasty.
The painting was commissioned by Konrad II of Znojmo on the occasion of his wedding with Mary, daughter of Uroš of Serbia in 1134. Apart of the donor couple, Konrad and Mary, the identity of the other depicted members of the dynasty is disputed among the historians. With two exceptions being the Přemysl the Ploughman, the legendary ancestor of the dynasty, and Vratislaus I, the first King of Bohemia.
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.