It's often interesting to delve into differing beliefs. An outing to Church of Santo Stefano is a superb way to learn about a part of the local way of life.
You're spoiled for sightseeing choice in Filattiera. Church of Santo Stefano is a great place to kick off here, but there are lots of other interesting spots to experience. Bagnone Castle, Museum of the Lunigiana Stele Statues, and Castello di Piagnaro are near the house of prayer and will top off your day nicely.