Churches, churches everywhere.  Two of our favorites:

For those in the historical know, the portico on the left is a 15th-century addition.  And for those in the mathematical know, that’s a dodecagonal bell tower.  (Twelve sided, my internet dictionary tells me.)  Further, there was much written about the underground spaces from Etruscan and medieval periods. Never found them.

On the outskirts of the town, close to where it drops straight down, an old church.

This one was built at the beginning of the 11th century (in a Romanesque style, as if I could tell the difference between this and the “Romanesque Gothic style” of Chiesa di Sant’ Andrea.  Suffice it to say, cramming for tests in “Humanities” is no guarantee of long-term memory, much less life-long learning.  Nothing beats being there, soaking it all in–to the point that you are overwhelmed with a sense of the past, the long duration, in decided contrast to the short history of the U.S.)