On 24 July 1957, Pierre Uri, Director of the General Economy Division of the High Authority of the European Coal and Steel Community (ECSC), draws up a note addressed to Jean Monnet, President of the Action Committee for the United States of Europe (ACUSE), in which he sets out a series of arguments in favour of the institutions of the ECSC, the European Economic Community (EEC) and the European Atomic Energy Community (Euratom) sharing a single seat.