Jan III Sobieski Jan III Sobieski He was born on August 17, 1629 in Olesko, d. June 17, 1696 in Warsaw) - the King of Poland from 1674, the Grand Hetman of the Crown from 1668, the Field Hetman of the Crown from 1666, the Grand Marshal of the Crown from 1665, and the Grand Ensign of the Crown fr