For centuries, Arba Rukun (1269), the Friday mosque of Merca (1609) and Fakr ad-Din (1269) were, in fact, the only mosques in East Africa to have minarets. Fakr ad-Din, which dates back to the Mogadishan Golden Age, was built with marble and coral stone and included a compact rectangular plan with a domed mihrab axis. Glazed tiles were also used in the decoration of the mihrab, one of which bears a dated inscription. The 13th century "Al Gami University" consisted of a rectangular base with a large cylindrical tower architecturally unique in the Islamic world.