Basilica of S.Ambrogio: gold altar or frontal, built between 824 and 859, the altar is signed by Vuolvino magister phaber (also called Volvinio), which is why it is also called the Vuolvino Altar. A masterpiece of Carolingian goldsmithery, it is made of wood surmounted by plates of gold and gilded silver, precious stones and enamels.
