Kraljeva Sutjeska is a Bosnian Franciscan monastery in Bosnia and Herzegovina.It includes a museum in which it houses historical treasures, a library which keeps rare and valuable historical records. There are around 11,000 works in the library, including 31 incunabula and works in Bosnian Cyrillic. The earliest parish register is preserved since 1641. There are also a number of Ottoman Turkish documents.
It also includes Grgurevo, a site where the kings' castle from 1330 along with his remains are located.
The historically important dwelling of Bosnian kings, Bobovac, is also a short distance from the castle remains and the monastery, as well as other sights of Kraljeva Sutjeska.
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.