The Rijksmuseum likes to celebrate the 400th birthday of Rembrandt, one of the most well-known artists of the world, in an appropriate way. In the Rembrandt 400 commercial, one of his most famous paintings 'The Night Watch', comes alive. Art historians believe that Rembrandt painted himself on The Night Watch. Therefore it seems only logical that the group of men on the painting sing him 'a happy birthday' song.