Monogram of <a href="//commons.wikimedia.org/wiki/Henry_IV_of_France" title="Henry IV of France">the king of France Henri IV</a> in the eastern half of the southern side of the Cour Carrée du Louvre, Paris, France. The letters "HDB" are for "Henri de Bourbon" (Bourbon is the family names of the kings).
<div class="fn value">
<a href="//commons.wikimedia.org/wiki/User:Tangopaso" title="User:Tangopaso">Tangopaso</a></div>
<span class="int-own-work" lang="en">Own work</span>