Wilhelm Emanuel Freiherr von Ketteler, Bischof von Mainz
<bdi><a href="//commons.wikimedia.org/wiki/Category:19th-century_unidentified_photographers" title="Category:19th-century unidentified photographers">Unidentified photographer</a>
</bdi>
before 1878 <div style="display: none;">date QS:P571,+1878-00-00T00:00:00Z/7,P1326,+1878-00-00T00:00:00Z/9</div>
Paul Münz: <i>Wilhelm Emmanuel Freiherr von Ketteler, Bishchof von Mainz. </i> Würzburg 1874 <a rel="nofollow" class="external text" href="https://archive.org/details/a621712201emmauoft">archive.org</a>