Possible Clues:

• Where you could once see Montessori and Marconi
• Bills once in Italian ATMs
• Catania cash replaced by the 70 Down
• Story about Rome's beginning as capital of Italy some time ago
• Cash that depicted Volta and Marconi
• Ex moneta italiana
• Coins in the Trevi Fountain, once
• Bygone Vatican money
• Italian bread that's no longer made
• Trevi cash, once