The Goat's Bridge is a large stone bridge that crosses the Miljacka river to the east of Sarajevo. It was built by the Ottomans in the 16th century. It is the only fully preserved bridge from the Ottoman period which still spans the Miljacka River. The bridge, which is made primarily of white hreša (marble), is a harmonious structure with one main arch and two round openings which help support the weight. This stone material is also used to build Bijela Tabija fortress and Visegrad Gate of the nearby Vratnik fortified town.
The oldest written record of this bridge was made by Mula Mustafa Bašeškija, who noted in 1771 that a stone wall was built from Kozija Ćuprija all the way to Alifakovac.
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.