Adelaide of Hesse
Adelaide of Hesse (after 1323–after 1371) was the eldest daughter of Landgrave Henry II of Hesse and Elisabeth of Thuringia. In September 1341 she married King Casimir III of Poland and was crowned queen consort.
The marriage was unhappy; Casimir soon lived apart from her while Adelaide resided at Żarnowiec castle. He separated from her in 1356 to marry another, and the church annulled Adelaide's marriage only in 1368. She returned to Hesse and, after Casimir's death, won Pope Gregory XI's support for the return of her property.