From Wikimedia:
Countess Potocka sat for this portrait in Paris where she went after returning from a trip to the Holy Land. She posed wearing a sleek and colorful, carmine-olive-black eastern outfit, thought to be Circassian or Turkish, which she adorned with several strings of pearls. Róża Krasińska, who with her mother went to Paris, wrote that she was a few times in the Winterhalter's studio, while the mother posed for her portraits. Winterhalter painted in Paris three portraits of the Countess Adamowa Potocka in the years 1854-1858.
Franz Xaver Winterhalter (1805–1873)
Portrait of Katarzyna Potocka née Branicka in oriental costume.
Date1854
Mediumoil on canvas
Dimensions116 × 88.5 cm (45.7 × 34.8 in)
National Museum in Warsaw
Signature bottom left: F. Winterhalter
Reference: Aldona Cholewianka-Kruszyńska, Panny Branickie z Białej Cerkwi na portretach F. X. Winterhaltera. "Gazeta Antykwaryczna" nr 9 2001, pp. 14-21