Onze helden zijn terug The slogan Our Heroes are Back is used to announce that, after an absence of one decade, all major pieces in the Rijksmuseum s collection are back where they belongherlands. With the support of main sponsor ING, entrance to the museum is free on the 13th of April from 12 00 to 00 00. This Flashmob recreates Rembrandt s Night Watch. It s considered one of the most famous paintings in the world.