The Mosque of Sultan Al-Nasir Mohammad Ibn Qala'un is built on a quasi-square-shaped structure. In the center of the mosque is an open court, which is surrounded by four aisles. The largest aisle is the one of the prayer direction. The mihrab, or niche indicating the direction of Mecca, is located in the center of the wall of the largest aisle. Preceding the mihrab is a dome, which was originally covered with green ceramic tiles.
The main entrance of the mosque is located in the center of the western wall. It is a monumental entrance that protrudes from the face of the wall. There is another monumental entrance at the northern facade. The mosque has two minarets; one tops the main entrance in the west and the other in the eastern north corner.
The mosque is surrounded on all sides with windows that were once covered with plaster on the inside and outside. The walls were covered with marble up to a height of 5.40 meters and the floor was also covered with marble.