A corner of the ceiling (arch) of the library in the <a href="https://en.wikipedia.org/wiki/Ch%C3%A2teau_de_Chantilly" class="extiw" title="en:Château de Chantilly">Château de Chantilly</a>. One can see the CoA of a marshal of France of the Gramont family, probably <a href="https://en.wikipedia.org/wiki/Antoine_III_de_Gramont" class="extiw" title="en:Antoine III de Gramont"> Duke Antoine III</a>
<a href="//commons.wikimedia.org/wiki/User:Jebulon" title="User:Jebulon">Jebulon</a>
<span class="int-own-work" lang="en">Own work</span>