If you could opt for a Protestant Wedding you are free to choose your wedding destination without any restrictions: many of the Protestant ministers are flexible and will perform the ceremony wherever you would like!
There are only few requirements requested and they can vary from one pastor to the next.
According to your wedding destination The Italian Wedding Event will provide you a list of the religious requirements required. You can freely have a unique ceremony which could include the religious and the civil portion wedding together: the Town Hall will realize your Nulla Osta , legally confirming your wedding.
You could also opt to be married civilly in your home country and have a religious ceremony in Italy.