Constance of Hungary was a 13th-century princess and queen consort who lived from approximately 1237 until 1302. As the daughter of King Béla IV of Hungary and Maria Laskarina, she was part of a prominent royal lineage that included several other notable siblings. Through her marriage to Leo I, the Grand Prince of Kiev, she became the Queen of Galicia. Her descendants were connected to various major royal houses across Central Europe, reflecting her significant dynastic position during the Middle Ages.