2007 enlargement of the European Union

New 2007 members shown in blue. Other EU members at that time shown in green.

The 2007 enlargement of the European Union joined Bulgaria and Romania to the European Union. It happened on 1 January 2007. The Treaty of Accession was signed on April 25, 2005 at Luxembourg, Neumünster Abbey. It was the seventh time the Union accepted new members.


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