Sir John Alexander Macdonald, GCB, KCMG, PC, PC (Can), (11 January 1815 – 6 June 1891) was the first Prime Minister of Canada and the dominant figure of Canadian Confederation. Macdonald's tenure in office spanned 18 years, making him the second longest serving Prime Minister of Canada. He is the only Canadian Prime Minister to win six majority governments. He was the major proponent of a national railway, the Canadian Pacific Railway, completed in 1885, linking Canada from the Atlantic Ocean to the Pacific Ocean. He won praise for having helped forge a nation of sprawling geographic size, with two diverse European colonial origins, numerous Aboriginal nations, and a multiplicity of cultural backgrounds and political views.