In order to have updated information about requirements needed to enter Italy 

visit: https://reopen.europa.eu/en/from-to/OTC/ITA

(select your country of origin from the list)

Once in Italy:

The current norms allow travel between "yellow" regions, also for tourism, between 5:00 and 22:00.

If you come from an "orange" or "red" region, in order to travel you need to provide a "green pass", that is one of these certificates:

- negative result of a molecular or antigenic swab, administered in the 48 hours preceding travel

- certificate of completed vaccination (the last dose must have been administered within the last 6 months)

- certificate of recovery (valid for 6 months)

For more information, consult the government page https://www.governo.it/it/ Articolo/domande-frequenti-sulle-misure-adottate-dal-governo/15638#zone