The Great Iwan (Arabic: الإيوان العظيم, romanized: al-Iwan al-Kabir) was a monumental throne hall located within the Citadel in Cairo, Egypt. It was built by the Mamluk sultan Al-Nasir Muhammad in the early 14th century and was considered one of the most impressive structures in the city at the time. It fell slowly into ruins over several centuries before being demolished by Muhammad Ali in 1825 to make way for the present-day Mosque of Muhammad Ali and other constructions.