Santa María de La Vid is a monastery in Spain's Duero Valley was founded on a different site, a place called Montesacro, in about 1146 by Domingo Gómez, illegitimate son of Queen Urraca of León and Castile and her lover Count Gómez González de Candespina. Domingo had become interested in the Praemonstratensian order on a visit to France, and this was the first Praemonstratensian house in Spain.
The monastery was moved to its present site in 1152, having been given the estate of La Vid by Alfonso VII of León and Castile, who was the half-brother of Domingo Gómez. It was closed as a result of the ecclesiastical confiscations of Mendizábal in the 1830s. It was re-opened in the 1860s by the Augustinians who still inhabit it.
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.