Obol (coin)
Obols through history
Silver obol of Athens, dated 515–510 BC. Obverse gorgoneion, reverse incuse square.
Charon's obol, 5th–1st century BC
A 19th-century obol from the British-occupied Ionian Islands
The obol (Ancient Greek: ὀβολός, obolos, also ὀβελός (obelós), ὀβελλός (obellós), ὀδελός (odelós). lit. "nail, metal spit"; Latin: obolus) was a form of ancient Greek currency and weight.