To find out whether, depending on your citizenship, country of long-term
residence and the duration and reasons for your stay, you need a visa
to enter Italy, see the Italian Ministry of Foreign Affairs website at https://vistoperitalia.esteri.it/home/en
or check with your local Italian Embassy or other diplomatic
representative before you travel.
The rules change regularly, so you should check you have the most up to date information for your trip.