Guillaume, 1st Baron Mallet de Chalmassy. Painted by Firmin Massot.
<bdi><a href="https://en.wikipedia.org/wiki/en:Firmin_Massot" class="extiw" title="w:en:Firmin Massot"><span title="Swiss painter (1766-1849)">Firmin Massot</span></a>
</bdi>
approximately between 1790 and 1828
Société d'Etudes Historiques de <a href="//commons.wikimedia.org/wiki/Tremblay-en-France" class="mw-redirect" title="Tremblay-en-France">Tremblay-en-France</a>