Khayyam, Omar ix. Illustrations of English translations of the Rubaiyat. W.H. Martin, S. Mason.
Encyclopaedia Iranica Online, July 2009

The Rubaiyat of Omar Khayyam contain some of the best-known verses in the world. The book is also one of the most frequently and widely illustrated of all literary works. The stimulus to illustrate Khayyam’s Rubaiyat came initially from outside Persia, in response to translations in the West.