Fodor's Expert Review Cryptoportiques
Entering through the elegant 17th-century City Hall, you can gain access to these ancient underground passages dating to 30–20 BC. The horseshoe of vaults and pillars buttressed the ancient forum from below ground. Used as a bomb shelter in World War II, the galleries still have a rather ominous atmosphere. Yet openings let in natural daylight and artworks of considerable merit have been unearthed here, adding to the mystery of the site's original function.