Piotr Gembicki born into a Polish noble family of Nałęcz coat of arms in Gniezno on 10 October 1585 and began his ecclesiastical career early and attended academies abroad. Later he became the secretary of king Sigismund III Vasa and regent of the Crown's Chancery. After Sigismund's son, Władysław IV Vasa, succeeded to the Polish throne in 1632, Gembicki led the diplomatic mission to Ferdinand II, Holy Roman Emperor. In 1635 he took part in the negotiations with Muscovy following the Smolensk War. In December 1635 he became the Deputy Crown Chancellor and Bishop of Przemyśl. Since then, his influence and wealth grew, and in 1638 he became the Great Crown Chancellor.