Castelvecchio Subequo has three patronal feasts: that of Saint Agatha, on 4 and 5 February and on 20 August; that of Saint John the Baptist, on 24 June; that of Saint Francis of Assisi, on 17 September, for the appearance of the stigmata, and on 4 October, for the saint's death.
The municipality holds the Chiesa e Convento di San Francesco, the Chiesa dei SS. Giovanni Battista ed Evangelista, the Chiesa di San Rocco and the Chiesa di Sant'Agapito.