The unique church, Orsanmichele (Or San Michele), was originally built to store grain in 1337, but it was converted into a church between 1380 and 1404. Each guild was instructed to commission statues of their patron saints to decorate the church, leading to a competition between the guilds, who hired famous artists including Donatello, Brunelleschi, and Ghiberti to provide the sculptures. You don’t need a ticket to visit, but a guided tour is highly recommended.