Brussels, 04/09/2012 (Agence Europe) - As every year in September, the European Heritage Days 2012 will allow millions of visitors free access to several thousand sites in 50 countries in Europe. They are a unique occasion for European citizens to visit places that are usually closed to the public. “By opening their doors, these sites open our eyes and minds to the shared and diverse cultural heritage that is the jewel in Europe's crown”, said European Commissioner for Education,...