Albert Einstein during a lecture in Vienna in 1921
<bdi><a href="https://en.wikipedia.org/wiki/en:Ferdinand_Schmutzer" class="extiw" title="w:en:Ferdinand Schmutzer"><span title="Austrian photographer (1870-1928)">Ferdinand Schmutzer</span></a>
</bdi>
1921<a rel="nofollow" class="external autonumber" href="http://www.anzenbergergallery.com/en/article/134.html">[1]</a>
<a rel="nofollow" class="external free" href="http://www.bhm.ch/de/news_04a.cfm?bid=4&amp;jahr=2006">http://www.bhm.ch/de/news_04a.cfm?bid=4&amp;jahr=2006</a>