Question: What is the date of death of Jadwiga Of Kalisz's husband?
Sentence (from "Władysław I Łokietek"): He tried to add the Duchy of Krakow( the Seniorate Province) in 1289, after the death of his half- brother Leszek II the Black and the withdrawal from contention of his ally Bolesław II of Masovia, but was unsuccessful.
Relevant evidence: No