Paul-Henri Charles Spaak (French pronunciation: ​[pɔl ɑ̃ʁi ʃaʁl spak]; 25 January 1899 – 31 July 1972) was an influential Belgian Socialist politician, diplomat and statesman. Along with Robert Schuman, Alcide De Gasperi and Konrad Adenauer he was a leader in the formation of the institutions that evolved into the European Union. Retiring from Belgian politics in 1966, Spaak died in 1972. He remains an influential figure in European politics and his name is carried, among other things, by a charitable foundation, one of the buildings of the European Parliament, and a method of negotiation.