10 countries joined in 2004, 2 joined in 2007 and 1 joined in 2013 to bring the total to 28.
Romania is a member of the European Union from 1 January 2007.
The Schuman Declaration of 1950 although he didn't speak of a European Union.
Croatia joined the European Union on the 1st of July 2013.
On the 1st of May 2004, the Greek part of Cyprus joined the European Union.
2007.
1995.
2004
1991
in 1993
May 2004.
2004.
1992