Portrait of <a href="https://en.wikipedia.org/wiki/en:Frederick_I,_Duke_of_Saxe-Gotha-Altenburg" class="extiw" title="w:en:Frederick I, Duke of Saxe-Gotha-Altenburg"><span title="First Duke of Saxe-Gotha-Altenburg (1646-1691)">Frederick I of Saxe-Gotha-Altenburg</span></a> (1646-1691), son of <a href="https://en.wikipedia.org/wiki/en:Ernest_I,_Duke_of_Saxe-Gotha" class="extiw" title="w:en:Ernest I, Duke of Saxe-Gotha"><span title="Duke of Saxe-Gotha and Saxe-Altenburg (1601-1675)">Ernest I, Duke of Saxe-Gotha</span></a>
<bdi><a href="https://en.wikipedia.org/wiki/en:Philipp_Kilian" class="extiw" title="w:en:Philipp Kilian"><span title="German engraver">Philipp Kilian</span></a>
</bdi>
between 16th century and 19th century
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