The external walls present architectural decorations dialogue with a rich sculptural apparatus: ogni cornice marcapiano è ornata con archetti pensili che poggiano on figurative protomesnow partly replaced by geometric corbels. Not only that: in the corner blocks of the corners of the first three cornices are depicted fantastic beings taken from bestiaries (first frame), animals (second frame), human figures (third frame). Finally, also sculpted are the capitals of the mullioned and three-light windows.
Numerous written and iconographic sources also report the presence around the Ghirlandina tower of cheese measuring shopsconfirmed by the forms still carved in stone of the west wall.