Moving away from via Dante Alighieri and walking down via dei Calzaiuoli, you'll enter piazza del Duomo. On the left is the Baptistery of San Giovanni. This magnificent Romanesque building, cladded with white and green marble, is dedicated to the patron saint of the city.
The Baptistery, referred to by Dante in his Comedy as “my beautiful San Giovanni”, was the place where Dante was baptised and what he thinks about when, exiled, he hopes to return to his home city. Entering the Baptistery, the striking golden mosaics of the ceiling show us a thirteenth century vision of Heaven and Hell, visions which Dante himself explores in the Comedy. Also depicted are the lives of Christ and John the Baptist as well as stories from the book of Genesis.
Leaving the Baptistery, enter the Cathedral of Santa Maria del Fiore (The Duomo) and go down into the crypt of Santa Reparata. The crypt is the archaeological site of the old cathedral of Santa Reparata, named after the third century Christian virgin martyr. This was Dante and his contemporaries' church.
Behind the Cathedral, in the Museo dell'Opera del Duomo there's a reconstruction of the ancient arnolfian façade of Santa Maria del Fiore, among whose statues stands out Boniface VIII, the famous Pope opposed by Dante and stigmatized in the Comedy.