The Mosque-Madrassa of Sultan Hassan is a massive mosque and madrassa located in the Old city of Cairo  it was built during the Mamluk Islamic era in Egypt  Its construction began 757 AH/1356 CE with work ending three years later "without even a single day of idleness"   At the time of construction the mosque was considered remarkable for its fantastic size and innovative architectural components  Commissioned by an-Nasir Hasan a sultan of a short and relatively unimpressive profile al-Maqrizi noted that within the mosque were several "wonders of construction".  The mosque was  for example  designed to include schools for all four of the Sunni schools of thought  Shafi'i  Maliki Hanafi and Hanbali