This is a large round building next to the Duomo and the Tower, which shouldn't be overlooked. I was standing in a gallery half way up the building, looking down into the dark interior when one of the attendants stepped into the centre and just sang a few beautiful notes which, thanks to the acoustics, rang out really strongly. I really can't do justice to the sound that it produced and which echoed around the whole building - it was the most beautiful noise I've ever heard. Don't miss it if you visit the Tower.
Is this your business?