In particular, one of the tombs (possibly in the walled-up chamber under the library) is assumed to belong to Sultan Abu Inan, the Marinid ruler who also built the Bou Inania Madrasa in Fes el-Bali (among other works) and died in 1358, but no inscription confirms this.[1][2][3][4] Another unidentified tombstone may belong to an earlier sultan, Abu Sa'id Uthman II, who died in 1331 and was the father of Sultan Abu al-Hassan (and grandfather of Abu Inan).[11] Among the other individuals buried here is a princess named Aisha, daughter of Sultan Abu Faris Abd al-Aziz II, whose tombstone is now held at the Batha Museum.[11]