Jadwiga of Poland reigned over the Kingdom of Poland as its first female monarch from 1384 until her death in 1399. Regarded as one of Poland's greatest rulers, Jadwiga is often compared to Casimir the Great and Bolesław the Brave. Also remembered for her charitable activities, Jadwiga of Poland established new schools, hospitals, and churches.
An ideal elite Renaissance woman, Bona Sforza was the queen of Poland and the wife of Sigismund I the Old. She is remembered for her fiery resistance to the Holy Roman Emperor, Maximilian I, when he suggested Bona be planted as a Habsburg spy to counter the Jagiellonian dynasty.
Part of the Piast dynasty, Cymburgis of Masovia was a Polish princess who became the duchess of Austria by virtue of her marriage to Ernest the Iron of the Habsburg dynasty. Though the marriage was initially not approved by the Habsburg House, it was a happy one.