Task: Text Categorization
Input (English): He depicted St. Cosmas and St. Demian in his glass painting All Saints Day, and Rose-Carol Long studied hidden iconography in his works such as Painting with a Green Center and Improvisation 33 [Orient] where she identified St. John the Divine. His later work like Tempered lan are pictographic, and he compares humanity to a giant triangle in his (*) Concerning The Spiritual In Art. Three of his Compositions series were displayed in the Degenerate Art exhibit by the Nazis before their destruction. FTP name this Russian-born German artist who taught at the Bauhaus and was involved in The Blue Rider group, named for one of his paintings, to promote abstract art.
Output (English): Fine Arts