Reliquary cross in gilded copper from Friesing Diocesan Museum; 12th century. Chromolithograph from Hefner-Alteneck's 鈥楥ostumes; Artworks and Appliances from the Middle Ages to the 17th Century;' Frankfurt; 1879. Illustration by Dr. Jakob Heinrich von Hefner-Alteneck; lithographed by H.P.; and published by Heinrich Keller. Hefner-Alteneck (1811 - 1903) was a German museum curator; archaeologist; art historian; illustrator and etcher.