Outstanding Greek public figures in the 20th century include Cretan-born Eleutherios Venizelos, prominent statesman of the interwar period; Ioannis Metaxas, dictator from 1936 until his death; Constantine Karamanlis, prime minister (1955–63, 1974–80) and president (1980–85) of Greece; George Papandreou, head of the Center Union Party and prime minister (1963–65); and his son Andreas Papandreou, the PASOK leader who became prime minister in 1981. Costas Simitis was leader of PASOK and prime minister from 1996 to 2004. He was succeeded by Kostas Karamanlis.