and the nearby vicinity.
Google, IBM, and a few other names, have their HQs there. If his preference is clean and tidy, shining buildings, he should go there.
I wonder if he even went inside Milan Cathedral, or the high end department store building top level where there are several eateries that let you get up close to the Milan Catherdral's amazing sculptures. BTW even on a budget you can still afford to eat a burger there, as long as you dont order drinks!
Rome's churches many of them are truly treasures to be seen, not just the familiar tourist spots that most likely are all he went to check off his "buck list".