The Boros Collection is the private art collection of the media entrepreneur and art patron Christian Boros and his wife Karen Boros. It is located in the former Reichsbahn bunker in Berlin. Christian Boros purchased the bunker in 2003 and made it into a five stories private museum. The collection consists of works of international contemporary artists from 1990 till today. Since 2008 excerpts of the collection are being publicly exhibited on 3000 qm, in 80 exhibition halls.