 The Dawoodi Bohra , a group of around one million Ismaili Shi 'ites who trace their faith back to converts from the Hindu faith during the time of the Fatimid caliph Al @-@ Mustansir Billah ( 1029 – 1094 ) , have been engaged in restorations of the Cairo mosques since the 1970s . Aside from respecting their heritage , the purpose of the campaign to restore Fatimid architecture in Cairo is to encourage <unk> , a pilgrimage which aims to increase the cohesion of the Bohra community internationally . These activities have drawn negative comments from critics in Europe and America who believe that the mosques should be preserved in their current state . In November 1979 the first newsletter of the Society for the Preservation of the Architectural Resources of Egypt wrote a scathing report of the Bohras ' renovation of the al @-@ Hakim mosque , saying " Though their method of financing the project is intriguing , their concrete arcades can only be deplored . " However , when the mosque was re @-@ opened a year later the Egyptian Gazette was complimentary about the transformation of the run @-@ down building , achieved without resort to public aid . 
