Remembered for ruling during a stable period in the history of the Polish-Lithuanian Commonwealth, this seventeenth-century regent served from 1674 until 1696 as both Grand Duke of Lithuania and King of Poland. A popular military leader in several battles against the Ottoman Empire, he earned the nickname of the "Lion of Lechistan."
He was born in Olesko, Poland (present-day Ukraine) to noble parents Jakub Sobieski and Zofia Teofillia Danilowicz. He graduated from Jagiellonian University in the mid-1640s.
He is perhaps most famous for his 1683 Battle of Vienna victory.
His marriage to Marie Casimire Louise de La Grange d'Arquien resulted in nine children.
He was a contemporary of English King James II.