The Anatolian Fortress, also known as the Anadoluhisari Fortress, is a medieval castle located on the Asian side of Istanbul, Turkey. It was built in the 14th century by the Ottoman Empire to protect the city from attacks by foreign invaders. The fortress is made of stone and has several large towers, bastions, and walls, which made it a formidable defensive structure at the time. Today, the Anatolian Fortress is a popular tourist attraction and offers beautiful views of the surrounding area.