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Constance of Hungary
Constance of Hungary, Uzhhorod castle
Born	c. 1237
Died	1302
Spouse	Leo I of Galicia
Issue	Yuri I of Halych–Volhynia Svyatoslava Lvovna of Halych–Volhynia Anastasia Lvovna of Halych–Volhynia
Father	Béla IV of Hungary
Mother	Maria Laskarina

Constance of Hungary (Hungarian: Magyarországi Konstancia, Ukrainian: Констанція Угорська) (c. 1237–1302), was a Queen consort of Galicia and a Grand Princess of Kiev by marriage to Leo I of Galicia, Grand Prince of Kiev (r. 1271–1301).^[1]

She was the daughter of Béla IV of Hungary and Maria Laskarina.

King Bela IV had ten children. Constance's sisters were St. Kunegunda, married to the Kraków-Sandomir prince Boleslaw V the Chaste, Bl. Yolanda of Poland, married to Prince Bolesław the Pious of Kalisz, Anna of Hungary, married to the eternal rival of the Romanovychs [uk] for the Galician throne, Ban of Machva and Slavonia Rostislav Mikhailovich, Elizabeth of Hungary, married to Duke of Bavaria Henry XIII Wittelsbach, St. Margaret of Hungary, who lived a religious life since her birth. Her brother was the king Stephen V of Hungary.

Through the children of her sister Anna, the children of Constantia and Leo I were related to the main royal families of Central Europe. She is a descendant of the Grand Dukes of Kiev Vladimir II Monomakh and Yaroslav the Wise. Great-great-granddaughter of the Rus princess Euphrosyne of Kiev, daughter of the Grand Duke of Kiev Mstislav I the Great.

They had three children:

• Yuri I of Halych–Volhynia (24 April 1252/1257 – 18 March 1308).
• Sviatoslava Lvovna of Halych–Volhynia (died 1302), a nun
• Anastasia Lvovna of Halych–Volhynia (died 12 March 1335), who married Siemowit of Dobrzyń.