The small church of Santa Oliva is located below the parish church of Santa Maria Assunta. The crypt is made up of two square plan spaces.
In a niche above the altar lies the ancient statue of the patron saint who, according to tradition, cannot be moved from his seat, under penalty of strong hail, damaging to the crops.
The first mention of this little chapel is 1295. The saint, originally from the nearby Anagni, is celebrated on June 11 of each year.