Once a year, during the European Week of Regions and Cities (OPEN DAYS), the CoR welcomes to its headquarters thousands of participants who take part in lively discussions or seek partners to collaborate on joint projects.
Jednom godišnje, za vrijeme Europskog tjedna regija i gradova (OPEN DAYS), OR u svom sjedištu ugošćuje tisuće sudionika koji sudjeluju u živahnim raspravama ili traže partnere za suradnju na zajedničkim projektima.