This is Florence for me: all red tiled roofs and walking the same streets as the Renaissance rock stars. Then BAM, you turn the corner and look who is there to greet you: your friendly neighborhood Duomo.
For more Duomo love may I suggest Brunellschi’s Dome by Ross King. For a great, in-depth story on the construction of this engineering marvel, you will enjoy watching the video below. Although it’s long (50 minutes), it’s very informative.