The obverse and reverse sides of an ancient coin of Athens.

Coin of Athens

The obverse and reverse sides of an ancient coin of Athens.

This illustration shows currency from the ancient city of Rhodes.

Coin of Rhodes

This illustration shows currency from the ancient city of Rhodes.

Mithridates VI, king of Pontus in Rome on a silver coin.

Mithridates

Mithridates VI, king of Pontus in Rome on a silver coin.