The Maastricht Treaty and how it has evolved
The Maastricht Treaty, officially known as the Treaty on European Union, was signed on 7 February 1992, in Maastricht, in the Netherlands, by the then-twelve Members of the European Communities. It entered into force on 1 November 1993, after being ratified by all Members.The Maastricht Treaty formally established the European Union, transforming the European Economic Community into a more cohesive and comprehensive union. It also introduced EU citizenship.