Claro abbey was founded in 1490 on the initiative of Scolastica de Vincemalis, a Benedictine religious of Milan who on 13 May 1490 became the establishment's first abbess. The monastery grew rapidly, and by 1516 was home to 16 nuns. In 1559, the religious were charged by decree of Pope Paul IV to relaunch and supervise Seedorf Abbey in the Canton of Uri. Intended for the education of girls, the buildings were enlarged several times during the 17th century, and again in the second half of the 20th 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.