Kinga of Poland was a Hungarian princess born in Esztergom who became the Grand Duchess of Poland through her marriage to Bolesław V. Although she held royal status, she and her husband maintained a vow of chastity. Following the death of her husband in 1279, she renounced her worldly position to join the Order of St. Clare. She spent her remaining years as a nun in Stary Sącz, dedicating herself to prayer and charity until her death in 1292.