Margaret Beaufort (1443 - 1509) , a descendant and passionately loyal supporter of the House of Lancaster, was married, while still a child of twelve, to the king’s half-brother Edmund Tudor, as a way of endowing him with her enormous fortune and lands.
Her husband died of plague leaving her a thirteen year old widow with a baby son and she was speedily remarried by her family; but the triumph of York meant that the new king Edward ordered her little boy Henry Tudor into the guardianship of one his favourites.
In 1485, her son won the Battle Of Bosworth and he received his crown on the battle field from his step-uncle’s hands. His first act after marching into London was to retreat with her for two long weeks, to celebrate their triumph and to plan their future.
She was a co-ruler of England, housed in every royal palace in the best rooms often with interconnecting doors to her son. She wrote the Book of the Royal Household, determining how state and private occasions should be performed. She was a keen landlord of her vast lands, and took an active part in the government of the kingdom. She outlived her adored son but survived long enough to see her grandson Henry inherit the throne. (x)