Mustansiriya Madrasah (Arabic,المدرسة المستنصرية) is a historical building in Baghdad, Iraq. It was the premises of one of the oldest Islamic institutions of higher learning in the world, established in 1227 as a madrasah by the Abbasid Caliph al-Mustansir making it one of the oldest madrasahs in the world. It is located on the left bank of the Tigris River, the building survived the Mongol sack of 1258, and has been restored. Nearby buildings included the Saray souq, the Baghdadi Museum, Mutanabbi Street, the Abbasid Palace and Caliph's Street.