|13th President of the European Parliament|
|Preceded by||Simone Veil|
|Succeeded by||Pierre Pflimlin|
|Born||8 January 1934
|Died||21 June 2003|
|Political party||PvdA, PES|
He was first elected to the House of Representatives in 1968. There he was spokesman for foreign affairs and defence. In the late 1970s he moved to the European Parliament, and was President of the European Parliament from 19 January 1982 to 24 July 1984.
In the third government of Ruud Lubbers (1989–1994) he was Secretary of State for European matters. He subsequently served a second period in the European Parliament, where he devoted himself to working for the accession of Turkey to the European Union.