Literally 'dome,' often used to refer to a domed mausoleum which contains the grave of a saint or some important personage.
Definition
The earliest surviving example of this type of structure is the Qubbat al-Sulaybiyya at Samarra which is octagonal. Another early example is the tomb of Ismail the Samanid in Balkh which is a square structure with a hemispherical dome. Also dated to the ninth century are large numbers of domed mausoleums at Aswan in southern Egypt. From the eleventh century this type of structure becomes widespread in the Islamic world and is now one of the most common building types.