Between the ribs are rich arabesques carved in stucco which also form a screen allowing some light in from the outside.[3] The corners of the dome transition into the square space of the walls with the help of muqarnas-carved squinches.[3] Although Georges Marçais assumed it dated to the Marinid period, Xavier Salmon has questioned this, based on inconsistencies in the cupola's decoration, and suggests that it was either created or restored during the Alaouite period, possibly by Moulay Rashid or Moulay Isma'il (who also commissioned the nearby anaza).[4]