Henry Charles Keith Petty-Fitzmaurice, 5th Marquess of Lansdowne, KG, GCSI, GCMG, GCIE, PC (London 14 January 1845 3 June 1927 Clonmel) was a British politician and Irish peer who served successively as Governor General of Canada, Viceroy of India, Secretary of State for War, and Secretary of State for Foreign Affairs. He has the distinction of having held senior positions in both Liberal Party and Conservative Party governments.