Otto Dix was one of the most significant German painters and graphic artists of the 20th century. Dix was a member of the Dresden Secession Group 1919; he was friends with Grosz and took part in the First International Dada Fair. Later, he joined the Berlin Secession and taught at the Dresden Academy of Fine Arts. His best known paintings are those made in the 1920s and classified as belonging to the New Objectivity. His works vary in style, but became increasingly realistic. People and everyday matters were ruthlessly exaggerated and their ugliness unmasked. In his portraits, he mercilessly represented public figures, reducing them to their naked physical nature. Defamed by the National Socialists, he withdrew completely and turned to landscape painting as well as to allegorical and Christian subject matters.