Largest Roman coin to be auctioned

The largest known silver Roman coin, dating to the 4th century C.E., will be auctioned in late May 2009 in the United States. The coin weighs 104.30 grams.(photo)

The large silver coin bears the image of Valentinian I and is believed to have been worth 48 siliquae. The coin will be part of a large auction of Roman, Greek and Byzantine coins.