The Treaty of Amsterdam amending the Treaty on European Union, the Treaties establishing the European Communities and certain related acts is signed in Amsterdam on 2 October 1997 and enters into force on 1 May 1999.

Treaty on European Union as amended by the Treaty of Amsterdam of 2 October 1997.

Treaty establishing the European Coal and Steel Community as amended by the Treaty of Amsterdam of 2 October 1997.

Treaty establishing the European Community as amended by the Treaty of Amsterdam of 2 October 1997.

Treaty establishing the European Atomic Energy Community as amended by the Treaty of Amsterdam of 2 October 1997.