in the direction towards which Muslims in the mosque would pray. This is something not found in any other Mamluk religious building, though there is apparently no evidence that this was seen as controversial at the time. This layout had the consequence of making the mausoleum project outwards into Rumayla square and towards the Citadel, probably to make it more prominent when seen from the Citadel. The mausoleum chamber is accessed from inside the mosque, through a doorway to the left of the mihrab in the qibla wall. On the same wall, on the right side, there is a large, door-sized window which also opens to the mausoleum chamber. This window is distinguished by a set of doors which are notable for their exceptionally fine craftsmanship, made from copper-niello, inlaid with gold and silver, and featuring geometric star patterns and Thuluth-style Arabic inscriptions.Inside, the chamber is even more lavishly decorated, with multicolored marble mosaic paneling on the lower walls and a large painted inscription of the Throne Verse, carved in wood, running around the entire chamber above this. The marble mihrab is similar to the one in the main qibla iwan of mosque. The square chamber transitions gradually to the round dome (12 meters in diameter) with the use of wooden pendentives, typical of Mamluk architecture, which are sculpted into muqarnas forms and richly painted and gilded. The cenotaph at the middle of the mausoleum chamber is dated to 1384, but Sultan Hasan's body was never found after he was killed, and as such he was never buried here. The mausoleum is also furnished with a large wooden lectern decorated with geometric star patterns and inlaid with ivory, which was meant to hold one of the giant royal copies of the Qur'an owned by the foundation. The dome of the mausoleum chamber, visible from outside and from the Citadel, is no longer original but was replaced with the current one in 1671. This might have been due to damage from the fallen minaret in 1659 or from cannonballs fired from the Citadel in times of conflict. The original dome was also made of wood, despite the heavy buttressed walls of the chamber being able to support something heavier. The original dome had a very different shape, however. An Italian traveler in the early 17th century described it as being shaped like an egg; more specifically, it started narrow at the