On 30 April 1953, Jean Monnet, President of the High Authority of the European Coal and Steel Community (ECSC), prepares with his team for the press conference that he will hold the same day in Luxembourg to announce the official opening of the common market in steel the following day. The photo shows Monnet (centre), with translator Ursula Wenmackers (on the left), Pierre Uri, Director of the General Economy Division of the High Authority (behind Monnet), Albert Coppé (standing to his right), Dirk Spierenburg (on the right), Belgian and Dutch Members of the High Authority and Georges Spira (back right), Head of the Interpreting Service.