Abul-Qâsem Ferdowsi Tusi (also Firdawsi or Ferdowsi (فردوسی), was a Persian poet and the author of Shahnameh ("Book of Kings"), which is one of the world's longest epic poems created by a single poet, and the greatest epic of Persian-speaking countries. Ferdowsi is celebrated as one of the most influential figures of Persian literature and one of the greatest in the history of literature.