The Wikipedia article for Gerrit van Honthorst is here.
This 1631 Gerrit van Honthorst portrait of Elizabeth Stuart shows a dress with a bertha and a lace collar.
Keywords: 1631, van Honthorst, Queen Elizabeth of Bohemia, Stuart family, Wittelsbach family, Princess, Queen, headdress, trapezoidal neckline, bertha, ruff, lace, jeweled waistband, virago sleeves, balloon sleeves, necklace, jeweled bodice ornament, bracelets, back flared sleeves, girdle, bows, shallow vee waistline, full skirt, regalia