The Mosque-Madrasa of Sultan Hasan (Arabic: مسجد ومدرسة السلطان حسن) is a monumental mosque and madrasa located in Salah al-Din Square in the historic district of Cairo, Egypt. It was built between 1356 and 1363 during the Bahri Mamluk period, commissioned by Sultan an-Nasir Hasan. The mosque was considered remarkable for its massive size and innovative architectural components, and is still considered one of the most impressive historic monuments in Cairo today.