European Political Community (1952)
An entity to be named the European Political Community (EPC) was proposed in 1952 as a combination of the existing European Coal and Steel Community (ECSC) and the proposed European Defence Community (EDC). A draft EPC treaty, as drawn up by the ECSC assembly (now the European Parliament), would have seen a directly elected assembly ("the Peoples' Chamber"), a senate appointed by national parliaments and a supranational executive accountable to the parliament.
Source: Wikipedia — European Political Community (1952) (CC BY-SA 4.0)