On this day in 1721 – Robert Walpole(portrait shown) took office as First Lord of the Treasury, Chancellor of the Exchequer and Leader of the House of Commons, becoming the first de facto prime minister of Great Britain. 
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On this day in 1721 – Robert Walpole(portrait shown) took office as First Lord of the Treasury, Chancellor of the Exchequer and Leader of the House of Commons, becoming the first de facto prime minister of Great Britain. 
