Abu ʾl-Qasim Firdowsi Tusi (c. 940–1020), or Ferdowsi[1] (also transliterated as Firdawsi, Firdusi, Firdosi, Firdausi) was a Persian poet[2][3] and the author of Shahnameh ("Book of Kings"), which is the world"s longest epic poem created by a single poet, and the national epic of Greater Iran. Ferdowsi is celebrated as the most influential figure in Persian literature and one of the greatest in the history of literature.