What is the name of the national epic of Greater Iran?

The Shahnameh is a long epic poem written by the Persian poet Ferdowsi between c. 977 and 1010 CE and is the national epic of Greater Iran. Consisting of some 50,000 "distichs" or couplets the Shahnameh is the world's longest epic poem written by a single poet. It tells mainly the mythical and to some extent the historical past of the Persian Empire from the creation of the world until the Arab conquest of Iran in the 7th century.