On 28 March 1957, the Belgian Socialist daily newspaper Le Peuple publishes an article by Jean Monnet, President of the Action Committee for the United States of Europe (ACUSE), which welcomes the signing, three days earlier in Rome, of the Treaties establishing the European Economic Community (EEC) and the European Atomic Energy Community (EAEC or Euratom).

In December 1957, the French monthly newspaper Le Monde Diplomatique publishes an extract from the address delivered by Jean Monnet, President of the Action Committee for the United States of Europe (ACUSE), at the Congress of the Cotton Industry in Harrogate in which he considers, in particular, the fundamental differences between the Common Market and the British proposal for a free trade area.

On 14 January 1949, George Marshall, US Secretary of State, writes a letter to Robert Schuman, French Foreign Minister, in which he recognises the role of France in the reconstruction of post-war Europe.

General view of the first session of the Consultative Committee attached to the High Authority of the European Coal and Steel Community (ECSC), held in Luxembourg on 26 January 1953.

Meeting of the ECSC Consultative Committee in the European Commission's 'Jean Monnet' building on the Kirchberg plateau, Luxembourg.

Robert Mischlich, a close collaborator of Robert Schuman, the French Foreign Minister, gives a mixed assessment of the action taken by the Council of Europe and the Organisation for European Economic Cooperation (OEEC) in favour of the European integration process.

On 30 October 1949, US Secretary of State Dean Acheson writes to Robert Schuman, French Foreign Minister, to assure him of his interest in seeking a concerted solution regarding the international status of Germany.

Robert Mischlich, a close collaborator of Robert Schuman, the French Foreign Minister, looks at the evolution of relations between France and Germany and particularly focuses on Schuman's relationship with Konrad Adenauer.

On 1 February 1952, Robert Schuman, French Foreign Minister, sends a letter to Johannes Hoffmann, Prime Minister of the Saar, in which he confirms the details of the representation and defence of the Saar’s interests in the institutions of the European Coal and Steel Community (ECSC).

On 17 January 1951, the French delegation to the Schuman Plan Conference speculates on the sustainability of the regime of ownership of the Ruhr mines and plants in the context of the future entry into force of the European Coal and Steel Community (ECSC).