A genealogical sketch of her is here. She married Catherine II’s natural son Aleksey Bobrinskiy. Her eldest daughter married one Nikolay Sergeyevich Gagarin (see comment below alluding to the Cold War and recall the first man to orbit the Earth was Yuri Gagarin).
From hermitagemuseum.org/wps/portal/hermitage/digital-collection/01.+Paintings/168262/?lng=pt; flaws in background removed with Photoshop.
Anna Bobrinskaya’s dress has a sewn-on bodice placing it years ahead of The West, to use Cold War language, a century and a half before Sputnik.
Keywords: Anna Dorothea von Ungern-Sternberg, Anna Vladimirovna, Freiin von Ungern-Sternberg, von Ungern-Sternberg family, Bobrinsky family, Romanov family, Baroness, Countess, Russian, straight coiffure, bun, bangs, jeweled headdress, necklace, lace modesty piece, trapezoidal neckline, lace bodice, U-décolletage, tight sleeves, Empire low waistline, lace close skirt, wrap