Portuguese infanta, saint, and queen of Castile (c.1195–1256)

Infanta Mafalda of Portugal was a Portuguese infanta (princess) and later Queen consort of Castile for a brief period. She was the second youngest daughter of King Sancho I of Portugal and Dulce of Aragon. She became queen consort during her brief marriage to the 10-year-old Henry I of Castile.