we would recommend staying in Alain & irenes apartment.
it's really well placed just on a back street behind the Duomo.. having said that as soon as you enter the courtyard it's really quiet .. we felt like it was an oasis from the business of the duomo.
although the apartment was a bit smaller than the pics made it look it had everything we needed . the bed was so comfortable.. slept very well ! Alain / irene/ team.. made the whole process of booking the holiday really easy & replied straight away to any texts I sent them... leaving me feeling confident that there wouldn't be any problems with the booking.
I would recommend staying here again. :))