Hetmans of the Polish–Lithuanian Commonwealth were the highest-ranking military officers, second only to the King, in the Polish–Lithuanian Commonwealth. The first Polish title of Grand Crown Hetman was created in 1505. The title of hetman was given to the leader of the Polish Army and until 1581 it was awarded only for a specific campaign or war. Later it became a permanent title, as did all the titles in the Kingdom of Poland and Polish–Lithuanian Commonwealth. It could not be revoked unless treachery had been proven. Hetmans were not paid for their services by the Royal Treasury.

Jan Amor Tarnowski was a Polish nobleman, knight, military commander, military theoretician, and statesman of the Crown of the Kingdom of Poland. He was Grand Crown Hetman from 1527, and was the founder of the city of Tarnopol, where he built the Ternopil Castle and the Ternopil Pond. The first Count of the Holy Roman Empire in the Tarnowski family (1547).