Yolanda of Poland was a 13th-century princess from the Árpád dynasty, born in Esztergom to King Béla IV of Hungary. After being educated in Poland under her sister Kinga, she married Bolesław the Pious in 1257. Throughout her marriage, she became well known for her extensive charitable work, supporting hospitals, monasteries, and the impoverished. Following the death of her husband in 1279, she dedicated her life to religious service, eventually becoming an abbess within the Poor Clare order.