Architecture: A Guide to Not Getting Kicked Out
When in Florence, do as the locals do. Visit the Duomo, but do not, I repeat, DO NOT, take a selfie in front of it. The locals will hate you.
Avoid anything with a flat roof, as it's a sign of poor breeding. Go for grand, sweeping curves, like the Ponte Vecchio.
Remember, it's all about the columns. Lots and lots of columns. Like, seriously, it's a column party.