Urban II · Omar Khayyám Were Urban II and Omar Khayyám alive at the same time? Yes. Urban II and Omar Khayyám were alive at the same time, from 1045–1051 to 1099. Urban II11th century pope and initiator of the CrusadesBorn c. 1035 · died 29 July 1099Omar KhayyámPersian mathematician and poetBorn 1045–1051 · died 4 December 1131 Ibn al-HaythamAl-BiruniWilliam the ConquerorUrban IIOmar KhayyámAl-GhazaliHildegard of BingenAverroesZhu Xi Urban II and Omar Khayyám in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.