European Union (EU), a supranational organization in Europe, dedicated to raise the economic and political integration and aimed at reinforcing cooperation among member states. The European Union was born on November 1, 1993, a date when the Treaty of the European Union or Maastricht Treaty was put into force and ratified a month before by 12 members of the European Community (EC).With the Treaty of the European Union, the European citizenship was granted to the citizens of each member State. Customs agreements were intensified and those on immigration with the aim of allowing European citizens more freedom in their lives, work and studies in any member state. Border controls were relaxed. A goal was set of circulating a single currency in Europe for 1999.