On 24 January 1951, the Belgian daily newspaper La Libre Belgique outlines the positions adopted by the governments of the Six with regard to the extent of supranationality to be granted to the High Authority referred to in the Schuman Declaration of 9 May 1950.

In 2000, on the 50th anniversary of the Schuman Declaration, the European Commission celebrates Europe Day with this poster portraying the stability and strength of the European integration process.

Le 15 juin 1950, la sidérurgie belgo-luxembourgeoise commente la proposition française de placer la production allemande et française du charbon et de l'acier sous l'autorité d'une organisation européenne supranationale.

On 4 July 1950, the Italian daily Communist newspaper L’Unità publishes a declaration by the Communist parties of Belgium, France, Germany, Italy, Luxembourg, the Netherlands and the United Kingdom in opposition to the Schuman Plan.

On 23 May 1950, the Groupement des industries sidérurgiques luxembourgeoises (GISL), an employers’ organisation involving the three Luxembourg iron and steel companies, namely ARBED, the S.A. des Hauts-Fourneaux et Aciéries de Differdange-St.Ingbert-Rumelange and Minière et Métallurgique de Rodange, speculates on the conditions in which the French ideas should be implemented.

On 8 June 1950, Dutch, Belgian and Luxembourg officials meeting at the Belgian Foreign Ministry prepare for the negotiations on the establishment of the international coal and steel pool.

On 30 October 1950, Albert Wehrer, Luxembourg diplomatic representative in Bonn, sends a report to Joseph Bech, Luxembourg Foreign Minister, in which he outlines the procedure that should be followed so that Luxembourg will be in a favourable position regarding the question of the seat of the institutions of the Coal and Steel Community.

On 10 May 1950, the Luxembourg daily newspaper Luxemburger Wort considers the various elements of the Schuman Declaration and the reactions to it in Germany, the United Kingdom and the United States.

On 24 July 1947, Jean Monnet, Commissioner-General of the French National Planning Board, writes a secret detailed note to Georges Bidault, the French Foreign Minister, concerning the implications of the Marshall Plan for French policy on Germany and on Europe.

On 18 April 1948, Jean Monnet informs French Foreign Minister Georges Bidault of the American view of the Marshall Plan and of the progress in negotiations in which he is involved in the United States on the issue of supplying France with food products originating in the USA.