The patron saint of Caselette is Saint George, celebrated on 23 April in the Church of San Giorgio Martire.
Co-patrons are Saints Marius, Martha, Audifax and Abachum, celebrated on 19 January in the Sanctuary of Sant'Abaco. The municipal territory also holds the Castello Cays di Pierlas and the Roman Villa of Caselette, as well as the Chapel of the Holy Family.