 The Juyushi Mosque was built by Badr al @-@ Jamali , the " Amir al <unk> " ( Commander of Forces ) of the Fatimids . The mosque was completed in 1085 under the patronage of the then Caliph and Imam Ma 'ad al @-@ Mustansir Billah . It was built on an end of the <unk> Hills which would ensure a view of the Cairo city . 
