Robert Walpole, 1st Earl of Orford (; 26 August 1676 - 18 March 1745), known between 1725 and 1742 as Sir Robert Walpole, was a British Whig statesman who is generally regarded as the de facto first Prime Minister of Great Britain, serving from 1721 to 1742. His formal titles included First Lord of the Treasury, Chancellor of the Exchequer,