Getting legally married in Italy can be overwhelming.
Here a growing list of embassies and consulates in Rome and in Milan.
A lot of couples prefer a symbolic ceremony in Italy.
The best way to get legally married in Italy without a headake is to hire a wedding planner or someone that will do all the legal stuff for you.

• Australia:
  • Australian Embassy in Rome
  • Australian Consulate-General in Milan
  • Embassy of Italy in Australia
• Canada:
  • Embassy of Canada in Italy
  • Embassy of Italy in Canada
• United Kingdom:
  • British Embassy in Rome
  • British Consulate General Milan
  • Embassy of Italy in Great Britain
• Ireland:
  • Embassy of Ireland in Italy
  • Italian Embassy in Dublin
• United States:
  • The U.S. Embassy and Consulates in Italy
  • Italian Embassy in Washington

Are you a GB citizen? Here for you a specific article: paperwork to getting married in Italy.
Here: Elopement in Lake Como - Villa del Balbianello wedding