Margaret Beaufort, Countess of Richmond and Derby (31 May 1443 or 1441 – 29 June 1509) is the mother of King Henry VII and paternal grandmother of King Henry VIII of England.
She is a key figure in the Wars of the Roses and an influential matriarch of the House of Tudor.
She founds two Cambridge colleges.
In 1509, she briefly serves as regent of England for her grandson.