Portrait of <a href="https://en.wikipedia.org/wiki/en:Guidobaldo_II_della_Rovere,_Duke_of_Urbino" class="extiw" title="w:en:Guidobaldo II della Rovere, Duke of Urbino"><span title="Italian condottiero">Guidobaldo II della Rovere, Duke of Urbino</span></a> (1514-1574), formerly identified as <a href="https://en.wikipedia.org/wiki/en:Ippolito_de%27_Medici" class="extiw" title="w:en:Ippolito de' Medici"><span title="Catholic cardinal">Ippolito de' Medici</span></a> (1511-1535)
<bdi><a href="https://en.wikipedia.org/wiki/en:Bronzino" class="extiw" title="w:en:Bronzino"><span title="Italian Mannerist painter">Bronzino</span></a>
</bdi>
<a rel="nofollow" class="external text" href="https://archive.org/details/gri_33125007376102">Internet Archive Volume 1</a>