The European Union is a single inlergovemmental and supranational community of European states based on the rule of law. All its action is based on treaties approved voluntarily and democratically by all member states of the European Union. It was created as a process ol cooperation and integration between six countries: France, Germany, Italy, Belgium, the Netherlands and Luxembourg. The first supranational institution between the six countries was established on the l'r ofJuly 1952 under the name of the European Coal and Steel Community (ECSC). which was created by signing the Treaty establishing the European Coal and Steel Community. The same Member States at a meeting in Rome on the 25th of March 1957 atso signed the following two treaties known as the "The Treaties of Rome": the Treaty establishing the European Economic Community (EEC) and the Treaty establishing the European Atomic Energy Community - (EAEC or Euratom). In accordance with the Treaty on European Economic Community, a supranational community called the European Economic Community (EEC) was established on thelst of January 1958. The Second Treaty of Rome of 1957 established the European Atomic Energy Community (EAEC). Unlike the ECSC Treaty, the Treaties of Rome were concluded for an indefinite period oftime, which gave them almost constitutional status. The aim of the EEC was to establish a common market based on,.Four Freedom": the free movement of goods, persons. capital and services. The success of the community is considered to be the establishment of a customs union, common agricultural, trade and transport policy. The ANITA RAJ.IC Raiinska 81, anita.skoric@gmail.com establishment of the Community was laying the foundation for the establishment of today's EU intemal market. The aim of creating Euratom (EAEC) was to provide member states with energy independence though the use of atomic energy. In addition to economic motives for the creation ol the Community, political ones were also important. These agreements are collectively called the Founding Agreements. The agreements have been substantially amended, and the Treaty establishing the European Coal and Steel Community expired in 2002. Today, the European Union is based on the Treaty on European Union and the Treaty on the Functioning of the European Union, which were accepted on basis of the Treaty of Lisbon, which entered into force on the I st of December 2009.