Catherine of Valois was the queen consort of England from 1420 to 1422, as the wife of King Henry V of England. She was the daughter of the beloved yet mentally unstable King Charles VI of France and remained a French princess until her marriage to the English king in 1420. She was also the mother of King Henry VI of England, who ruled the country during two separate periods between 1422 and 1471. As a young girl, she was neglected by her family, particularly her mother, and spent her adolescent years at the Poissy convent in France. In her short life, she endured considerable turmoil and a troubled existence. Catherine lost her husband, King Henry V, at a young age. Later, she had a relationship with the Welsh courtier Sir Owen Tudor; this relationship played a significant role in the foundation of the Tudor dynasty.