An Elaborate Interior
You’ll want to linger over several sculptures inside the Duomo, but there are a couple of things you should look out for in particular. There’s the statue of St. Bartholomew, depicted wearing his own flayed skin, and a beautiful sundial featuring the twelve signs of the zodiac. A special relic, a nail from Jesus’ cross, is kept in its own tabernacle and is only displayed once a year. This ritual is called the Rito della Nivola and you’ll need a special ticket if you want to attend.