From Wikimedia; edges cropped. Also posted to The Belle Époque Album here.
Maria Theresia wears a Napoléonic revival evening dress for her de László portrait. She also wears fripon curls.
Keywords: 1900, de László, Maria Theresia Borbone-Hohenzollern 1867, Principessa Maria Teresa Maddalena di Borbone delle Due Sicilie, Fürstin von Hohenzollern, Borbone family, Hohenzollern family, Princess, German, wavy coiffure, tiara, necklace, pendant, scoop neckline, quarter length notched full sleeves, waist band, Empire low waistline, close skirt, wrap, theatrical dress