The Spaak method of negotiation is named after Paul-Henri Spaak, a Belgian politician, who applied this method at the Intergovernmental Conference on the Common Market and Euratom in 1956 at Val Duchesse castle in preparing for the Treaties of Rome in 1957.

During the negotiations leading to the conference at Val Duchesse, most of the real negotiations took place prior to the actual Intergovernmental Conference (IGC) within the Spaak Committee that was charged with setting the agenda for the Val Duchesse conference. The final report of the committee then formed the basis for the final treaty which was then approved in Rome. Within this negotiating method, the preparatory committee has a strong initiating and brokerage role in the phase preceding the conference, while the actual Intergovernmental Conference only deals with negotiating small changes in the original agenda prepared by the preparatory committee.

This method was also applied to the preparation of the Economic and Monetary Union (EMU) by the Delors Committee.

• Messina Conference
• Sherpa (emissary)

• Laurent, Pierre-Henri (September 1970). "Paul-Henri Spaak and the Diplomatic Origins of the Common Market, 1955–1956". Political Science Quarterly. 85 (3): 373–396. doi:10.2307/2147876. JSTOR 2147876.

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