An antique mid-19th century porcelain plaque by KPM. The hand-painted oval plaque represents a portrait of a young woman in white veil holding an oil lamp. After an original 1782 painting titled Portrait of a Lady as a Vestal Virgin by Angelica Kauffman, 1741 to 1807, a Swiss Neoclassical painter. Embossed hallmark KPM is on the backside. The Konigliche Porzellan-Manufaktur Berlin, or KPM, was one of the most influential porcelain factories in 18th-century Germany, and it still operates today. KPM is revered for its porcelain plaques depicting historical scenes or copies of famous paintings. Golden frame. Collectible Neoclassical Porcelain Decor For Interior Design.