Portrait of the mathematician and philosopher Carl Friedrich Gauss
<bdi><a href="https://www.wikidata.org/wiki/Q19284307" class="extiw" title="d:Q19284307"><span title="German painter">Gottlieb Biermann</span></a>
</bdi>
1840<div style="display: none;">date QS:P571,+1840-00-00T00:00:00Z/9</div>
Gauß-Gesellschaft Göttingen e.V. (Foto: A. Wittmann).