Stock Photo: Tombstone of Agnes Bernauer, 1410-1436, mistress to Albert III of Bavaria. From the Agnes Bernauer Chapel in Straubing. Chromolithograph from Hefner-Alteneck's "Costumes, Artworks and Appliances from the early Middle Ages to the end of the 18th Century," Frankfurt, 1883. IIlustration drawn by Hefner-Alteneck, lithographed by CR, and published by Heinrich Keller. Dr. Jakob Heinrich von Hefner-Alteneck (1811-1903) was a German archeologist, art historian and illustrator. He was director of the Bav