Question: When did Konstancja Poniatowska's father die?
Sentence (from "Kazimierz Poniatowski"): Prince Kazimierz Poniatowski (15 September 1721 – 13 April 1800) was a Polish Szlachcic, "podkomorzy wielki koronny" (1742–1773), Lieutenant general of the Royal Polish forces, "generał wojsk koronnych".
Relevant evidence: Yes