Head: Court workshop of Emperor Frederick II Hohenstaufen, Southern Italy; c. 1240 
Bust: Venice; second half of the 16th century 
Socle: circa 1850
Chalcedony, silver gilt, enamel, pearls, green porphyry
H. 20.8 cm; W. 18.8 cm; D. 9.5 cm

This medieval head carved from chalcedony is most likely from the court workshop of Frederick II Hohenstaufen who was crowned Holy Roman Emperor in 1220. It was remounted on a silver-gilt bust in the late 16th century, the lavishness of which is a testament to the value attached to this particular piece.