 The wealth of Fatimid architecture was found in the main cities of Mahdia ( 921 – 948 ) , Al @-@ Mansuriya ( 948 – 973 ) and Cairo ( 973 – 1169 ) . The heartland of architectural activity and expression during Fatimid rule was at al @-@ Qahira , the old city of Cairo , on the eastern side of the Nile , where many of the palaces , mosques and other buildings were built . Al @-@ Aziz Billah ( ruled 975 – 996 ) is generally considered to have been the most extensive of Fatimid builders , credited with at least thirteen major landmarks including the Golden Palace , the Cairo Mosque , a fortress , a belvedere , a bridge and public baths . 
