House of Tudor ruled their domains for just over a century. Henry VIII was the only son of Henry VII to live to the age of maturity. Issues around the royal succession (including marriage and the succession rights of women) became major political themes during the Tudor era. The House of Stuart, descended from Henry VII's daughter Margaret, came to power in 1603 when Elizabeth I died and the Tudor line failed. For analysis of politics, diplomacy and social history, see Tudor period. The Tudors descended on Henry VII's mother's side from John Beaufort, 1st Earl of Somerset, one of the illegitimate children
Royal Observatory, Greenwich the present-day Maritime Museum, was the birthplace of both Henry VIII and his daughters Mary I and Elizabeth I; the Tudors used Greenwich Castle, which stood on the hilltop that the Observatory presently occupies, as a hunting lodge. Greenwich Castle was reportedly a favourite place for Henry VIII to house his mistresses, so that he could easily travel from the Palace to see them. The establishment of a Royal Observatory was proposed in 1674 by Sir Jonas Moore who, in his role as Surveyor General at the Ordnance Office, persuaded King Charles II to create the observatory, with John Flamsteed