The church of Holy Trinity is located in the hamlet of Olfino and although the subject of numerous interventions, has maintained the characteristics of the medieval style, with a simple facade gable, the small central rosette, finishing with arches under the roof, the bell tower with a window arched on each side. Inside there is a single nave truss roof, the walls have frescoes dating back to 1500 overlapping and partially covered with stucco in 1600.