- Born on 3 September 1928 in Luxembourg (L), deceased 26 August 2007 in Luxembourg

- Nationality: Luxembourgish

- Member of the Luxembourg Chamber of Deputies (1959‒1975)

- Member of the European Parliament, the Consultative Assembly of the Council of Europe and the Assembly of Western European Union (1959‒1969)

- Luxembourg Minister for Foreign Affairs and Foreign Trade (1969‒1974)

- Luxembourg Prime Minister and Minister for Foreign Affairs and Foreign Trade (1974‒1979)

- President of the 30th Ordinary Session of the General Assembly of the United Nations (1975‒1976)

- President of the Federation of Liberal and Democratic Parties of the European Community (1976‒1981)

- Luxembourg Deputy Prime Minister and Minister for Foreign Affairs, Foreign Trade and Cooperation (1979‒1980)

- President of the European Commission (1981‒1985)