German Post has issued a stamp celebrating the centennial of foundation of the Blue Rider group. Der Blaue Reiter (The Blue Rider) was a group of artists in Munich, Germany. The group was founded by a number of Russian emigrants, including Wassily Kandinsky, Alexej von Jawlensky, Marianne von Werefkin, and native German artists, such as Franz Marc, August Macke and Gabriele Munter. Der Blaue Reiter was a movement lasting from 1911 to 1914, it was the idealistic – romantic, spiritual flow of German Expressionism, as opposed to the more realistic directions in Dresden and Berlin. The artists from this group rejected the Salon painting. They thought that the growing alienation of nature should be absorbed by a \”deeper vision\” of things. An example of the expressionist works of various artists of this group is the image of \”Blue Horse\” by Franz Marc in 1911 (illustrated on the stamp). According to the color theory founded by this group of artists blue was the color of the spirit.