Following the Covid-19 government guidelines, it is not mandatory to wear a mask indoors but recommended.
It will be your own decision whether to wear it or not. Kindly be informed that the organisers will not provide masks during the conference.
In the following link you will find all the information relating to the measures in force in Italy: https://www.viaggiaresicuri.it/approfondimenti-insights/saluteinviaggio.