Edward VI was only ten when he succeeded to the throne in 1547. Since the Norman Conquest, England has to date had a total of 40 monarchs. With the exception of Edward V, one of the princes murdered in 1483, Edward VI was the only one whose whole reign was under a regency. This placed heavy responsibility upon the Lord Protector, Edward Seymour (who became Duke of Somerset), and the Lord President of the Council, John Dudley (Earl of Warwick and Duke of Northumberland).