Karl Brulloff. Portrait of Countess Yu. P. Samoilova and Her Ward Amacilia Pacini Leaving a Ball. 1842. Oil on canvas. The Russian Museum, St-Petersburg, Russia. More.
Countess Yulia Samoilova (née Palen, 1803-1875) was a rich heiress and Brulloff's mistress. After her first marriage to Count N. Samoilov, which ended with a permanent separation, she traveled all over Europe, living mostly in Italy and Paris. She met Brulloff in Rome and they fell in love. She supported him throughout his life and he painted numerous portraits of her. Unfortunately, they could not marry because divorce was illegal under the tenets of the Orthodox church. We can see her face in The Last Day of Pompeii as the mother with two daughters, as the dead woman in the center of the picture and several others.
See: Karl Brulloff. Rider. Portrait of Giovanina and Amacilia Pacini, the Foster Children of Countess Yu. P. Samoilova.