Konstantinos Karamanlis (born February 23 [March 8, New Style], 1907, Próti, near Sérrai, Ottoman Empire [now in Greece]—died April 23, 1998, Athens, Greece) was a Greek statesman who was prime minister from 1955 to 1963 and again from 1974 to 1980. He then served as president from 1980 to 1985 and from 1990 to 1995.