Gustav Mahler, pravděpodobně v roce 1909. Either Aimé Dupont's (1842–1900)[1] wife, Madame Etta Greer, or their son Albert Dupont.[2] Photoprint copyrighted by the studio A. Dupont, N.Y. - File:Gustav Mahler 1909.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=10247023