In addition to Ricky's post about Bologna....
https://www.theflorentine.net/2021/07/28/florence-extends-unesco-world-heritage-site-boundary/
This is, IMHO, one of the gotta-do corners of Firenze! In addition to the glorious views from this lofty hill in Oltrarno, San Miniato is a treasure. I've not yet been inside San Salvatore al Monte but hope to find the doors open next time.