A unique four-night film festival boasts screenings of rarely-seen movies recently restored by Italy’s Cineteca di Bologna. This year’s films include Buster Keaton’s “Sherlock Jr.,”  accompanied by a live pianist; Alessandro Blasetti’s “Lucky to Be a Woman;” and Dario Argento’s “Suspiria.” Authentic Italian gelato in festival-inspired flavors will be served every day one hour before each screening. Martinos Auditorium, Granoff Center for the Creative Arts, 154 Angell Street.