JUSTICE AND HOME AFFAIRS
Within the EU, citizens have a right to live in any EU country. Borders can be crossed almost without noticing since the Schengen Agreement abolished checks at the EU's internal borders (with the exception of Bulgaria, Croatia, Cyprus, Ireland, Romania and the United Kingdom).
The EU also works to protect citizens from international crime and terrorism, and to ensure your access to the local justice system and respect for your fundamental rights wherever you are in the EU. Access to an effective justice system is an essential right, one of the founding principles of European democracies..
(source : http://europa.eu/pol/justice/index_en.htm)