The sanctuary of the Holy Trinity has very ancient roots. In 1993, traces of an ancient Roman oratory, dating back to the 12th-13th centuries, were found. During the 16th century the oratory was enlarged and a new chapel was built, where the image of the Holy Trinity was painted, by an anonymous Lombard painter, which soon became the object of great popular devotion.
Around 1590, it was decided to completely rebuild the complex: the orientation of the church was changed and only the chapel of the Holy Trinity was preserved.
The new sanctuary was completed around 1608 and the bell tower was built by 1659. The porticoed façade, on the other hand, probably dates back to the second half of the 17th century.
Above the main altar, there is an altarpiece painted by Camillo Procaccini and workshop, representing the Coronation of the Virgin (1610-18). The altarpiece is framed by a fine stucco frame, with angels playing music, made in the second decade of the 17th century.