From s019.radikal.ru/i643/1206/54/f58564ec8f5a; spots throughout image removed and upper right area blurred with Photoshop by gogm.
This and the previous portrait of Maria Theresia have much in common including her hair jewelry and the lace neck band. Her dress has a lace yoke at the neckline that serves a modesty piece and bertha.
Keywords: van Meytens, Empress Maria Theresia, Empress, Habsburg family, Austrian, curly coiffure, jeweled headdress, veil, lace, off shoulder scoop neckline, modesty piece-bertha, elbow length close sleeves, forward-back flared engageantes, vee waistline, neck band, earrings, jeweled bodice ornament, robes, regalia