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Belgium, France, Germany, Italy, Luxembourg and the Netherlands sign the European Defence Community (EDC) Treaty in Paris.
The ECSC Treaty enters into force. Jean Monnet is appointed president of the High Authority and Paul-Henri Spaak is president of the Common Assembly.
Luxembourg is chosen as the temporary headquarters for the ECSC.
The ECSC High Authority takes office.
The General Agreement on Tariffs and Trade (GATT) decides to grant Belgium, France, Germany, Italy, Luxembourg and the Netherlands a derogation from the most-favoured-nation treatment, to allow them to fulfil their ECSC obligations.