Above: Portraits of Schoenberg, painted by his contemporaries.

Working clockwise from the top left:

Arnold Schönberg, Oskar Kokoschka, 1924

Bildnis des Komponisten Arnold Schönberg (Picture of the composer Arnold Schönberg), Egon Schiele, 1917

Bildnis Arnold Schönberg (Portrait of Arnold Schönberg), Max Oppenheimer, 1909

Portrait of Arnold Schönberg, Richard Gerstl, ca. 1905-6 (Gerstl painted Schoenberg's likeness on multiple occasions - this solo portrait is the most detailed of the lot).

-Rose.