Born between 1038 and 1048, living until about 1125 , this poet become the best known, if not the only known, representative of oriental poetry for the west. Khayyam was a Persian poet, mathematician, and astronomer, renowned in his own country and time for his scientific achievements but known to English–speaking readers for his Rubaiyat (Quatrains) in the version. The Rubaiyat of Omar Khayyam, published in 1859 by Edward Fitzgerald (q.v.) He discovered a geometrical method to solve cubic equations by intersecting a parabola with a circle. His work on algebra was known throughout Europe in the middle Ages, and he also contributed to calendar reform. Mausoleum of the great poet and mathematician of Iran, which is situated 4 km. south east of Nishabur in a beautiful garden in this town, was constructed in 1341 A.H. (1962 A.D.).