This profile bust portrait is taken from Rokotov's three-quarter length portrait of the Empress seated, painted in 1763; see D.A. Rovinski, Dictionnary of Russian engraved portraits, St. Petersburg, 1889, Volume I, p.698, number 231 and Detailed illustrated Catalogue of the Exhibition of Russian Portrait Painting,St. Petersburg, 1902, p.109 three quarter length portrait (illustrated)