While in this exhibit I read about three more paintings of paintings to 
add to my growing list:

<ul>

<li><a target=_blank 
href="http://en.wikipedia.org/wiki/Tribuna_of_the_Uffizi_(painting)">Johann 
Zoffany's <i>Tribuna of the Uffizi</i></a></li>

<li><a target=_blank 
href="http://www.wga.hu/html_m/r/robert/louvre3.html">Hubert Robert's 
<i>Project for Transformation of the Grande Galerie of the 
Louvre</i></a> (it's hanging the Louvre; somehow I missed it during my 
trip)</li>

<li><a target=_blank 
href="http://www.muzeo.fr/sites/default/files/styles/image_moyenne_def/public/oeuvres/peinture/patrimoine/vue_du_salon_carree_du_louvre_79762.jpg">Nicolas-Sebastien 
Maillot <i>Salon Carre du Louvre in 1831</i></a> (a.k.a. <i>Raft of the 
Medusa shown in Salon Carre of the Louvre, 1831</i>) (also shown in the 
Louvre; I missed this one too; oh well, I found a number of other 
paintings of paintings in the Louvre)</li>

</ul>