The Prince Ludwig August of Saxe-Coburg-Koháry and his cousin the Duke of Penthièvre.
<bdi><a href="//commons.wikimedia.org/wiki/Category:19th-century_unidentified_photographers" title="Category:19th-century unidentified photographers">Unidentified photographer</a>
</bdi>
circa 1870 <div style="display: none;">date QS:P571,+1870-00-00T00:00:00Z/9,P1480,Q5727902</div>
DEFRANCE, Olivier. <i>La Médicis des Cobourg: Clémentine d'Orléans</i>, Bruxelles: Éditions Racine, 2007