Treaty establishing the European coal and steel community (signed in Paris on 18 April 1951) -- Treaty establishing the European economic community (signed in Rome on 25 March 1957) -- Treaty establishing the European Atomic energy community (signed in Rome on 25 March 1957) -- Single European act (signed at Luxembourg on 17 February 1986 and at the Hague on 28 February 1986) -- Other instruments relating to the communities

1. European Economic Community
2. Euratom
3. European Coal and Steel Community