George Frederick, Duke of Prussia, was a member of the House of Hohenzollern, born on June 10, 1595. He became the Duke of Prussia in 1618 and ruled until his death in 1660. His reign was marked by efforts to strengthen the duchy and improve its economy, particularly through trade and agriculture. As a Protestant leader, George Frederick played a significant role in the political landscape of the time, especially during the Thirty Years' War. He was known for his diplomatic skills and alliances, which helped maintain the stability of Prussia during a tumultuous period in European history.