Art Deco Rosenthal Porcelain Parrot Figurine Signed Karner. F or your consideration is a stunning and large Rosenthal porcelain parrot figure designed by Theodor Karner. This outstanding figure is full of character and beautifully hand-painted with vivid colors. The parrot measures 10″ in length, is 9″ wide and 8 3/4 in height.