deaths
December 4, 1131
Omar Khayyám, Persian poet, astronomer, mathematician, and philosopher (born 1048)
Omar Khayyam
Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm Nīshābūrī, commonly known as Omar Khayyam, was a Persian poet and polymath, known for his contributions to mathematics, astronomy, philosophy, and Persian literature. He was born in Nishapur, Iran and lived during the Seljuk era, around the time of the First Crusade.