If you were baptized in a Catholic church and therefore you are an observant Catholic, and have the desire to Get Married or Renew your Vouws in a Catholic Church in Italy, first of all you have to turn to your parish priest, in order to inform him that you wish to get married in a Catholic Church in Italy. After this, you must begin gathering and arranging the documents, that are required for the celebration of a religious wedding with the help of your parish priest. Once all the papers have been gathered, your priest must submit the whole dossier to the Curia (the most important religious organization of the Catholic Church) of your city of residence to let it approve.
If you haven’t got married with a civil wedding yet, you should do in your country of residence, because one of the required documents, in order to celebrate a Religious Wedding, will be the Civil Wedding certificate. Otherwise you can also take into consideration the chance of celebrating two ceremonies in only one day in Italy
If you wish to invite your priest in Italy, he himself can celebrate your wedding in a Italian Catholic Church.