Omar Khayyam was a Persian mathematician, astronomer, and poet. He was born in Nishapur, in northeastern Iran, and spent most of his life near the court of the Karakhanid. Seljuq rulers in the period witnessed the First Crusade. Born: 18 May 1048 in Nishapur, Persia (now Iran) Died: 4 December 1131 in Nishapur, Persia (now Iran) […]