Marvel at the size of Aosta Cathedral. Stay for a mass if you can or simply wander around and enjoy a break from the outside world.
This principal church in Aosta is popular with fellow travelers, so be sure to put it on your travel itinerary. However, your day doesn't end there. There are many more options ready for you to experience after Aosta Cathedral. Teatro Romano Ruins, Champoluc, and Arch of Augustus are not far away.