Seth P.
Google
Entry to the cathedral is free, but you can buy tickets for an audio guide of the cathedral and a tour of the bell tower in the Battistero, which is across the street. There are no signs for the bell tower tour time, but during May it was at 12.30. So arrive at 12.15.
If no one is at the ticket desk, please wait a few minutes. The clerk takes visitors to the cathedral to get their audio tour started.
Lovely staff! Thank you so much.