Bernhard von Bülow en 1870 en sous-lieutenant du 7ème régiment des hussards.
<bdi><a href="//commons.wikimedia.org/wiki/Category:19th-century_unidentified_photographers" title="Category:19th-century unidentified photographers">Unidentified photographer</a>
</bdi>
1870<div style="display: none;">date QS:P571,+1870-00-00T00:00:00Z/9</div>
Mémoires du chancelier Prince de Bülow, 1931