I cannot locate an image of the Grassi original or find out which Liechtenstein Princess she is.
From Wikimedia; the color has not been altered.
This young Princess of Liechtenstein could step out of a post-revoltionary Vigée-Lebrun portrait. She wears a large turban and tight sleeves. Waistlines would not be this low until the 1920s.
Keywords: Pfeiffer, Grassi, Liechtenstein family, long curly coiffure, turban, jeweled scoop neckline, long tight sleeves, ruffled cuffs, waist band, low waistline, close skirt