 Coins are found in Greek burials by the 5th century BC, as soon as Greece was monetized, and appear throughout the Roman Empire into the 5th century AD, with examples conforming to the Charon’s obol type as far west as the Iberian Peninsula, north into Britain, and east to the Vistula river in Poland.The jawbones of skulls found in certain burials in Roman Britain are stained greenish from contact with a copper coin; Roman coins are found later in Anglo-Saxon graves, but often pierced for wearing as a necklace or amulet.Among the ancient Greeks, only about 5 to 10 percent of known burials contain any coins at all; in some Roman cremation cemeteries, however, as many as half the graves yield coins.