The Vidovdan Heroes Chapel is a Serbian Orthodox chapel and mausoleum located on the Holy Archangels Georgije and Gavrilo Orthodox Cemetery located in Sarajevo.
The crypt of the chapel contains the bodily remains of Gavrilo Princip and other members of Young Bosnia who took part in the assassination of Archduke Franz Ferdinand on 28 June 1914.
The twelve people interred in the crypt of the chapel are Gavrilo Princip, Bogdan Žerajić, Vladimir Gaćinović, Nedeljko Čabrinović, Danilo Ilić, Veljko Čubrilović, Neđo Kerović, Mitar Kerović, Mihajlo Miško Jovanović, Jakov Milović, Trifko Grabež and Marko Perin.
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.