Career
The richest magnate of his time, owner of huge properties in the Dnipro Ukraine (Crown of Poland). Nicknamed "Litlle King of Ruthenia" ("królik Rusi"). Franciszek became Krajczy of the Crown in 1736, Field Clerk of the Crown and voivode of Volhynian Voivodship in 1755, voivode of Kijów Voivodship in 1755–1771 and starost of Belz, Hrubieszów, Ropczyce, Sokal, Jabłonów and Opalin.