An antique Royal Vienna porcelain cabinet plate. The plate is adorned with a rare portrait of Queen Louise, the Queen of Prussia, standing on stairs. The plate is adorned with Cobalt blue enamel borders with gold decorated medallions and accents representing urns, scrolls, Windmill, and landscape designs. The portrait is signed by the artist, Wagner, lower left. Marked with a blue Beehive mark, a gold and green ink mark, and inscribed in black, Louise, on the backside. Circa: 19th century. Antique and Vintage European Porcelain Cabinet Plates, Royal Portraits, Interior Design, and Collectibles.