The Visovac Monastery was established in the 14th century by Augustinian monks, who erected a small monastery and church on the island dedicated to the Apostle Paul. In 1445, it was enlarged and adapted by Franciscans, who settled on the island having withdrawn from parts of Bosnia when invading Turks had taken over. A new monastery was constructed in the 18th century.
The oldest preserved part of the current complex dates from the 14th century. The monastery houses a historically significant collection of Christian books and a rich library containing many historical manuscripts and rare books, including a rare incunabula of Aesop's fables (Brescia 1487) printed by the Lastovo printer Dobrić Dobričević, and a collection of documents known as 'the sultan's edicts'. A sabre once belonging to Vuk Mandušić, one of the best-loved heroes of Serbian epic poetry, is also housed at Visovac.
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.