Ivan Sirko

Ivan Dmytrovych Sirko ; ; ; .}} ( – August 11, 1680) was a Zaporozhian Cossack military leader, Koshovyi Otaman of the Zaporozhian Host and putative co-author of the famous semi-legendary Cossack letter to the Ottoman sultan that inspired the major painting ''Reply of the Zaporozhian Cossacks'' by the 19th-century artist Ilya Repin. Provided by Wikipedia