Also known for opposing to what he saw as colonial exploitation of Ukraine by the Russian Empire, even though he himself was ethnically Serbian. Hugo Kołłątaj 1750–1812 Polish Active in the Commission for National Education and the Society for Elementary Textbooks, and reformed the Kraków Academy, of which he was rector in 1783–86. Co-authored the Polish-Lithuanian Commonwealth's Constitution of May 3, 1791, and founded the Assembly of Friends of the Government Constitution to assist in the document's implementation.