Citizenship of the EU Citizenship of the European Union was introduced by the Maastricht Treaty,which was signed in 1992,and has been in force since 1993. EUROPEAN UNION EBPONERCKM CbO3 EU两OPESEU时I日 EUROPAISCHE UNION UNITED KINGDOM OF EUROPEAN UNION KONINKRIJK DER NEDERLANDEN BUNDESREPUBLIK GREAT BRITAIN AND NORTHERN IRELAND PEy5ΛMKA5ATP习 DEUTSCHLAND REPUBLIC OF BULGARIA PASPOORT ΠAC⊙OP REISEPASS PASSPORT 7A5sP⊙RT ⊙ o ⊙Citizenship of the EU • Citizenship of the European Union was introduced by the Maastricht Treaty, which was signed in 1992, and has been in force since 1993