The Mosque of Ibn Tulun is one of the oldest mosques in Cairo, Egypt, built between 876 and 879 AD. It was commissioned by Ibn Tulun, the governor of Egypt, and is known for its unique architectural style, which reflects the Abbasid influence. The mosque features a large courtyard, a distinctive minaret, and intricate brickwork. Covering an area of about 6,000 square meters, the mosque is notable for its simplicity and elegance. It is one of the few mosques that has retained its original form over the centuries. The mosque remains an important historical and cultural site, attracting visitors from around the world.