The Treaty of Nice amending the Treaty on European Union, the Treaties establishing the European Communities and certain related acts is signed in Nice on 26 February 2001 and enters into force on 1 February 2003.

Treaty on European Union as amended by the Treaty of Nice of 26 February 2001.

Treaty establishing the European Community as amended by the Treaty of Nice of 26 February 2001.

Treaty establishing the European Atomic Energy Community as amended by the Treaty of Nice of 26 February 2001.

Summary of the Treaty of Nice, published in January 2001 by the Secretariat-General of the European Commission.

Diagram showing the three-pillar structure of the European Union following the entry into force of the Nice Treaty on 1 February 2003.