On 3 October 1955, Jacques Doublet, Director-General of Social Security in France and Chairman of the Subcommittee for Social Issues in the Intergovernmental Committee established by the Messina Conference, forwards to Paul-Henri Spaak, Belgian Foreign Minister and President of the Committee, a letter in which he gives an account of his meeting in Brussels with the representatives of the International Confederation of Christian Trade Unions (ICCTU) and emphasises their concerns regarding economic and social integration in Europe.
On 20 March 1957, René Mayer, President of the High Authority of the European Coal and Steel Community (ECSC), forwards to Paul-Henri Spaak, Belgian Foreign Minister and President of the Intergovernmental Conference on the Common Market and Euratom, a letter in which he informs him of the position taken by the High Authority on the powers and responsibilities of the new institutions provided for by the Treaties establishing the European Economic Community (EEC) and the European Atomic Energy Community (EAEC or Euratom).
On 13 March 1948, in Luxembourg, Paul-Henri Spaak, Belgian Prime Minister and Foreign Minister, delivers an address during which he describes the nature of and the threats posed by the Soviet Union’s foreign policy.
On 25 February 1957, Paul-Henri Spaak, Belgian Foreign Minister and President of the Intergovernmental Conference on the Common Market and Euratom, delivers an address to the Mars et Mercure Industrial and Commercial Circle of Former Officers and Reserve Officers in which he outlines some of the economic and political implications of the Common Market, with particular regard to the association of the Overseas Countries and Territories (OCTs).
In this interview, André Dubois, former member of the Secretariat of the Intergovernmental Conference on the Common Market and Euratom, emphasises the role played by Paul-Henri Spaak, Belgian Foreign Minister and President of the Conference, during the negotiations at the Château de Val Duchesse.
On 24 June 1953, at the end of the Conference of the Foreign Ministers of the Six held in Baden-Baden, Paul-Henri Spaak, President of the ad hoc Assembly, and Heinrich von Brentano, Chairman of the Constitutional Affairs Committee, give Alcide de Gasperi, President of the Special Council of Ministers of the ECSC, a progress report on the work being undertaken in preparation for the planned European Political Community (EPC).
On 4 April 1955, Paul-Henri Spaak, Belgian Foreign Minister, sends a letter to the German Chancellor, Konrad Adenauer, in which he proposes a revival of the European idea by extending the responsibilities of the High Authority of the European Coal and Steel Community (ECSC) to other sources of energy and to transport.
On 13 March 1948, in Luxembourg, Paul-Henri Spaak, Belgian Prime Minister and Foreign Minister, delivers an address during which he describes the nature of the disagreement between the Great Powers regarding the future status of Germany.
On 13 March 1948, in Luxembourg, Paul-Henri Spaak, Belgian Prime Minister and Foreign Minister, delivers an address during which he describes the reasons for the rejection of the Marshall Plan by the Soviet Union and its European satellites.
On 9 May 1962, the French weekly newspaper Opera Mundi Europe publishes an interview with Paul-Henri Spaak, Belgian Minister for Foreign Affairs, on the subject of a Political Europe.