The artist is anthropov
Vorontsova Anna Karlovna (nearer. Skavronskaya; 1722-1775) – wife of Chancellor Count M. And. Vorontsova, cousin of Empress Elizabeth Petrovna. The state-date of the Empress Elizabeth Petrovna (1742), Ober-Hofmeisterin (1760).
Depicted in the order dress of the cavalier lady of the Order of St. Catherine of the Big Cross, with the Order of St. Catherine of the Big Cross (tape and star).