Portrait photograph of <a href="https://en.wikipedia.org/wiki/Arthur_Schopenhauer" class="extiw" title="w:Arthur Schopenhauer">Arthur Schopenhauer</a>
Schäfer, Johann
March 1859
<a rel="nofollow" class="external text" href="http://edocs.ub.uni-frankfurt.de/volltexte/2007/81000013/">Frankfurt am Main University Library</a>