The patrons of Sellero are Saint Desiderius, celebrated on 23 May, to whom the Chiesa di San Desiderio is dedicated, and Saint Mary of the Assumption, on 15 August, titular of the Chiesa di Santa Maria Assunta.
The municipality's territory holds the Chiesa di San Giacomo Apostolo, the Santuario della Beata Vergine del Patrocinio, the Parco Archeologico Sellero and the site of Coran.