Queen Jadwiga of Poland (1373 or 1374 – 17 July 1399) also known as Hedwig, was the first female monarch of the Kingdom of Poland, reigning from 16 October 1384 until her death. She was the youngest daughter of Louis the Great, King of Hungary and Poland, and his wife Elizabeth of Bosnia. Jadwiga was a member of the Capetian House of Anjou, but she had more close forebears among the Polish Piasts. In 1997 she was canonized by the Catholic Church.
Jadwiga was crowned "king" in Poland's capital, Kraków, on 16 October 1384. With her mother's consent, Jadwiga's advisors opened negotiations with Jogaila, Grand Duke of Lithuania, who was still a pagan, concerning his potential marriage to Jadwiga.
Jogaila signed the Union of Krewo, pledging to convert to Catholicism and to promote his pagan subjects' conversion. Jogaila, who took the baptismal name Władysław, married Jadwiga on 15 February 1386. Legend says that she had agreed to marrying him only after lengthy prayer, seeking divine inspiration.