Charles I, Holy Roman Emperor.
<bdi><a href="https://en.wikipedia.org/wiki/en:Albrecht_D%C3%BCrer" class="extiw" title="w:en:Albrecht Dürer"><span title="German painter, printmaker, mathematician, and theorist">Albrecht Dürer</span></a>
</bdi>
Cropped from <a href="//commons.wikimedia.org/wiki/File:Charlemagne-by-Durer.jpg" title="File:Charlemagne-by-Durer.jpg">File:Charlemagne-by-Durer.jpg</a>