Diyarbakir Fortress is a historic structure located in the city of Diyarbakir, Turkey. It is known for its impressive black basalt walls, which stretch over 5 kilometers and rise up to 12 meters high. The fortress has been a significant site since ancient times, with origins dating back to the Roman period. It has served various purposes throughout history, including military defense and administrative functions. The fortress is recognized as a UNESCO World Heritage Site, highlighting its cultural and historical importance. Visitors can explore its numerous towers, gates, and ancient inscriptions, which reflect the diverse civilizations that have inhabited the region, including the Romans, Byzantines, and Ottomans.