 On the score of Prometheus, he wrote next to the instruments separate parts for the tastiere per luce, the color organ (Campen 2007, Galeyev 2001, Gleich 1963).In the second half the nineteenth century, a tradition of musical paintings began to appear that influenced symbolist painters (Campen 2007, Van Uitert 1978).In the first decades of the twentieth century, a German artist group called The Blue Rider (Der Blaue Reiter) executed synesthetic experiments that involved a composite group of painters, composers, dancers and theater producers.