Ring money of bronze, of silver, and of gold was used by the Celts in trade from Ireland to the Danube region. The dating of Celtic ring money is uncertain. Some authorities date the use of ring money from as early as 800 B.C. and it may have been used as late as 100 B.C. Some believe the bronze rings are actually just strap fittings, not a trade currency. Bronze rings are, however, sometimes found in quite large hoards and, in Spain, they are sometimes found with silver bar and disk ingots, and with 2nd century B.C. denarii of the Roman Republic. Undoubtedly they were used as fittings but they were also undoubtedly used as a store of wealth and for trade.