The Great 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 notable for its unique architectural style, which reflects the influence of Abbasid design. The mosque features a large courtyard, a distinctive minaret, and intricate stucco decorations. Covering an area of about 6.5 acres, the mosque is renowned for its spaciousness and simplicity. It is one of the few mosques in Egypt that has retained its original form and structure over the centuries. The mosque remains an important historical and cultural site, attracting visitors and scholars alike.