This is her Wikipedia article, "Apolonia Ustrzycka (17 January 1736 – 1814) was a Polish noble lady.
She married twice. The first time with Antoni Lubomirski in 1749, and the second time with Kazimierz Poniatowski on 21 January 1751."
Apolonia wears a pannier dress with a one-piece bodice with bodice and skirt adorned with swags of flowers and more flowers in her hair.
Keywords: 1757, Bacciarelli, Ustrzycki family, Poniatowski family, Polish, long straight coiffure, jeweled floral headdress, scoop décolletage, modesty piece, lace, elbow length close sleeves, forward-back flared engageantes, vee neckline, panniers, floral bodice ornament, floral skirt ornament, floral sleeve ornament, wrap