The patron of Perrillo, a hamlet of about 1,200 residents three kilometres south of Benevento, is Saint Donatus the Martyr, celebrated on 7 August in the Church of San Donato.
The town's other hamlets have their own patrons: San Marco ai Monti celebrates Our Lady of the Snows on 5 August, while the main town celebrates Saint Michael the Archangel on 8 May.