<a href="https://en.wikipedia.org/wiki/Leopold_II,_Holy_Roman_Emperor" class="extiw" title="w:Leopold II, Holy Roman Emperor">Archduke Peter Leopold, later Leopold II, Holy Roman Emperor</a>, drawing the plan of a fortification, previously misidentified as <a href="https://en.wikipedia.org/wiki/Archduke_Charles_Joseph_of_Austria_(1745%E2%80%931761)" class="extiw" title="w:Archduke Charles Joseph of Austria (1745–1761)">Archduke Charles Joseph of Austria (1745–1761)</a>, second son of Empress Maria Theresia
<bdi><a href="https://en.wikipedia.org/wiki/en:Jean-%C3%89tienne_Liotard" class="extiw" title="w:en:Jean-Étienne Liotard"><span title="Genevan painter (1702-1789)">Jean-Étienne Liotard</span></a>
</bdi>
<ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20050419084049/http://www.ville-ge.ch/musinfo/mahg/publics/pages/boite_outils/jeux/mariet.htm">MAH online exhibit</a>, in which the sitter is wrongly identified as Archduke Karl Joseph</li>
<li><a class="external free" href="https://de.wikipedia.org/wiki/Bild:Karl_Joseph_von_%C3%96sterreich_Pastell.gif">http://de.wikipedia.org/wiki/Bild:Karl_Joseph_von_%C3%96sterreich_Pastell.gif</a></li></ul>