Elisabeth of Pilica, born in 1372 and died in 1420. She was the daughter of Siemowit IV, Duke of Masovia. Their marriage in 1417 solidified the union between Poland and Lithuania, and she was later crowned as Queen consort of Poland. Sadly, she passed away without bearing any children.
The Grand Quest of Władysław II Jagiełło: Unveiling the Legacy of a Medieval Monarch