You may spot Collegiata di San Secondo across town before you actually find this incredible religious building. Peek inside if it's open or just take in the facade from the street.
If you're spending a while in Asti, Collegiata di San Secondo is a fine place to kick off your exploring. This principal church is one of numerous attractions that'll keep you busy here. Cathedral of Asti, Piazza Alfieri, and Riserva Naturale Speciale Valle Andona are also ready to be explored nearby.