1772 Magdalene Charlotte Hedevig Numsen by Jens Juel (Frederiksborg Slot - Hillerød Denmark)
Her Danish Wikipedia article is here.
From Wikimedia; spots removed from background with Photoshop by gogm.
Magdalene Charlotte's dress looks more 1782 than 1772, particularly the fichu filling in a square neckline, but the coiffure is 1770s. Her dress appears to have a vest with an integral hood and the dress may be a robe à la française.
Keywords: 1772, Juel, Baroness, Danish, straight coiffure, cap, square neckline, fichu, bows, vest, ruching, hood, long close sleeves, necklace, earrings, robe à la française