Matthew Rowan Griffiths (born 15th April 1935, aged age 81) is a retired Rainian politician who served as the Prime Minister of Rainier from 1979 until 1987, the longest serving Prime Minister from the Labour Party. Griffiths was Labour party leader between 1979-87 and served in a ministerial roles in the government of Emyr Phillips as Minister of the Treasury from 1968-73. He was MP for the constituency of Seattle North from 1961 to his retirement in 1997.