The Monastery of Royal Saint Mary of Iranzu is a Roman Catholic monastery located in Abárzuza, Navarre. It was founded by Pedro de Artajona in the late 12th century, being Artajona's place of burial upon his death in 1193. The Cistercian Order had a large part in its building throughout the 12th century.
It was dissolved in 1839 and confiscated by the State. It was abandoned and became ruinous until 1942, when the Provincial Government of Navarre refurbished it. One year after, a Theatine Fathers community was established there. The Cistercian-style church was built during 12th century. The cloister is partly Cistercian (12th century) and partly Gothic (13-14th centuries). Additional minor Renaissance parts were added during 17th century.
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.