Possible Clues:

• Go round the corner round one in Italy
• Act One is set in a foreign city
• City can, encircling an ancient one
• Code-breaker cut down in regional capital
• First capital in 1861 of united Italy
• City can, if located round old city
• Round the bend about one in Italy
• NW Italian city with famous Shroud
• Change direction about one in Italy
• I may be found in that corner of Italy