Question: When did Konstancja Poniatowska's father die?
Sentence (from "Kazimierz Poniatowski"): He was a great-grandson of the poet, courtier and alleged traitor, Jan Andrzej Morsztyn and through his great-grandmother, Catherine Gordon, lady-in-waiting to Queen Marie Louise Gonzaga, he was related to the House of Stuart and thereby connected to the leading families of Scotland, Spain and France.
Relevant evidence: No