The meaning of art in social and psychological contexts is a constant concern for art historian Reinhold Heller. An authority on 19th and 20th century German art and especially on German Expressionism, he is the author of numerous books and exhibition catalogues on Edvard Munch and Gabriele Münter, and Hildegard Auer. Other publications have concerned printmaking, the Symbolist movement, the emergence of abstraction, Dada, resistance and art in National Socialist Germany, and the art of the Wilhelmine and Weimar periods. In 2010, he curated "The Birth of Expressionism: Brücke in Dresden and Berlin 1905-1913” for the Neue Galerie New York, the first exhibition devoted to this pioneering group of German Expressionist artists at a major American museum. In 2016, he co-curated the exhibition "Edvard Munch and German Expressionism" at the Neue Galerie New York.