The old Russian dress of the Empress with a kokoshnik, a sarafan and magnificent sleeves  is a fancy dress in this portrait. (cf. Catherine holds an ordinary carnival mask in her hands).
<bdi>After <a href="https://en.wikipedia.org/wiki/en:Stefano_Torelli" class="extiw" title="w:en:Stefano Torelli"><span title="Italian painter (1712-1784)">Stefano Torelli</span></a>
</bdi>
18<sup>th</sup> century <div style="display: none;">date QS:P571,+1750-00-00T00:00:00Z/7</div>
<a rel="nofollow" class="external autonumber" href="http://fureteuse.livejournal.com/6193.html#cutid1">[1]</a>