The House of Tudor was an English and Welsh dynasty that held the throne of England from 1485 to 1603. They descended from the Tudors of Penmynydd, a Welsh noble family, and Catherine of Valois. The Tudor monarchs ruled the Kingdom of England and the Lordship of Ireland for 118 years with five monarchs: Henry VII, Henry VIII, Edward VI, Mary I and Elizabeth I. The Tudors succeeded the House of Plantagenet as rulers of the Kingdom of England, and were succeeded by the Scottish House of Stuart. The first Tudor monarch, Henry VII, descended through his mother from the House of Beaufort, a legitimised branch of the English royal House of Lancaster, a cadet house of the Plantagenets. The Tudor family rose to power and started the Tudor period in the wake of the Wars of the Roses (1455–1487), which left the main House of Lancaster extinct in the male line.

Catherine of Valois or Catherine of France was Queen of England from 1420 until 1422. A daughter of King Charles VI of France, she married King Henry V of England and was the mother of King Henry VI. Catherine's marriage was part of a plan to eventually place Henry V on the throne of France, and perhaps end what is now known as the Hundred Years' War. But, although her son Henry VI was later crowned in Paris, the war continued.