The sober interior has Byzantine-style frescoes, an 11th-century altar canopy, and a crypt built on Etruscan and ancient Roman pillars.
The Etruscan pillars are larger than the Roman ones.
mnli hypothesis: The Etruscan pillars are larger than the Roman ones. premise: The sober interior has Byzantine-style frescoes, an 11th-century altar canopy, and a crypt built on Etruscan and ancient Roman pillars.