Possible Clues:

• Key duo forged to get cash in Europe once
• US co-ed touring old European capital
• Revolutionary Circle and School split by old leader in old capital
• It's nothing to do with Italian leader welcoming Pole, in a roundabout way, to old capital
• Move quickly in rejection of old English currency once
• Old Lisbon loot
• Old currency used, 40 per cent of coins converted
• Old bit of Lisbon that is toured by Brussels party
• A bit of Portugal rarely seen these days
• Euro's predecessor in Portugal