From www.altesses.eu/princes030.php.
Beatrice's over-dress is somber, but her under-dress is made of gorgeous material. Like many dresses of the day, it is extensively decorated with lace.
Keywords: 1635, van Dyck, Beatrice Cusance, Beatrix de Cusance, duchesse de Lorraine, baronne de Belvoir, princesse de Cantecroix, comtesse de Champlitte et de Wallhain, comtesse de Cusance, comtesse de Saint-Julien, comtesse de Wavre, comtesse de Geel, comtesse de Braine-l'Alleud, comtesse de Plancenoit., Cusance family, Lorraine family, Duchess, French, straight coiffure, headdress, bangs, earrings, necklace, square décolletage, lace collar, lace bertha, floral bodice ornament, draped jeweled bodice ornament, bows, waist band, vee waistline, over-dress, elbow length puffed over-sleeves, under-dress, long puffed tapered under-sleeves, lace back-flared cuffs, under-skirt, necklace, draped necklace, earrings, bracelets