The Ibn Tulun Mosque is one of the oldest mosques in Cairo, Egypt, built between 876 and 879 AD by Ahmad ibn Tulun. It is notable for its unique architectural style, which features a large courtyard, a distinctive minaret, and intricate brickwork. The mosque covers an area of about 6,000 square meters, making it one of the largest mosques in the city. The mosque's design reflects the influence of Islamic architecture during the Abbasid period. Its minaret, resembling a spiral staircase, stands at 40 meters tall and is one of the most recognizable features of the mosque. The Ibn Tulun Mosque remains an important historical and cultural landmark in Cairo.