This mosque is considered to be one of the "minor" works of Sinan, architect to the sultans. But there are several reasons why this mosque is anything but minor. First, it represents a transition in the process of Sinan's experimentation with space: the return to a hexagonal formula (from one where the dome is supported on an octagonal base), resulting in a softening of the transitions from one feature to another and thus of greater spatial homogeneity. Second, it's one of the rare instances where the interior of a mosque is revetted in decorative tile. The Iznik tile motifs featured on the squinches supporting the dome, on the frieze below the galleries, and on the qibla (wall panel facing Mecca), depict chrysanthemums, carnations, and cornflowers. The calligraphic tiles proclaim the 99 Attributes of God. Third, and unique in Turkey, is the placement of three tiny black stones said to be from the Kaa'ba in Mecca embedded above the main portal, the mihrab, and the mimbar.