Malevich and the black square12/08/2015December 8, 2015It was considered downright revolutionary: "Black Square" by Kazimir Malevich. It was first exhibited 100 years ago, on December 7, 1915, in St. Petersburg. Just recently, it revealed a secret.https://p.dw.com/p/1HJ2yImage: picture-alliance/dpa/R. HaidAdvertisement