Fodor's Expert Review Cattedrale di S. Secondiano
Chiusi Church Free
This beautiful cathedral, which practically abuts the Museo Nazionale Etrusco, is thought by many to be the among the oldest churches in Tuscany; parts of it date from the mid-6th century. It houses the remains of Santa Mustiola, the patron saint of the city. It has very little artificial light inside, so you can get a pretty good idea of how people experienced this space over the centuries.