Beethoven's friend Babette Koch (1771-1807), photograph of an anonymous oil portrait
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span>
Beethoven-Haus Bonn, Ley, Band I, Nr. 106 (<a rel="nofollow" class="external text" href="http://www.beethoven-haus-bonn.de/sixcms/detail.php?id=&amp;template=dokseite_digitales_archiv_de&amp;_dokid=i3343&amp;_seite=1">weblink</a>; copyfraud watermark removed in a rough and ready way)