European Union
Organizations
in wich Poland participates or participated

European Union

The European Union (EU) is a supranational and intergovernmental union of 27 democratic member states in Europe. It was established under that name by the Treaty on European Union (The Maastricht Treaty) in 1992. It forms the three pillar framework and includes the European Economic Community, a limited Common Foreign and Security Policy, and a limited Police and Judicial Co-operation in criminal matters.

Growth of the European Union
1957  Belgium, France, German Federal Republic, Italy, Luxembourg, Netherlands
1973  Denmark, Ireland, United Kingdom  
1981  Greece
1986  Portugal, Spain
1995  Austria, Finland, Sweden
2004  Cyprus, Czech Republic, Estonia, Hungary, Latvia,
Flag of the European Union      

          Lithuania, Malta, Poland, Slovakia, Slovenia.
2007  Bulgaria, Romania
2013  Croatia
2020  United Kingdom left the European Union
More information

Polonica stamps:

Belgium 2004, 19 IV
Belgium 2004, 07 VI
Bosnia-Herzegovina 2004, 30 XII
Bulgaria 2007, 31 I
Cyprus 2004, 01 V
Czech Republic 2004, 01 V
Czech Republic 2008, 25 XI
Estonia 2004, 01 V
 France 2004, 01 V
Georgia 2016, 24 X
German Fed. Rep. 2004, 06 V
Gibraltar 2003, 15 IX
Greece 2003, 16 IV
Guinea-Bissau 2005,
Hungary 2004, 01 V
Ireland 2004, 01 V
 Latvia 2004, 01 V
Lithuania 2004, 01 V
Lithuania 2013, 15 VI
Malta 2004, 01 V
Malta 2017, 12 I
Netherlands 2004, 10 V
Northern Macedonia 2008, 22 V
Northern Macedonia 2011, 4 V
 Portugal 2004, 03 V
Slovakia 2004, 01 V
Slovenia 1997, 06 VI
Slovenia 2004, 01 V
Slovenia 2008, 01 I
Spain 2007, 23 III