The country home I grew up in had uneven floors and door frames.
Then I studied abroad in Italy and realized the phenomenon was global.
Then I moved to San Francisco and realized it was a joke at this point.
Building codes are a joke!
Brunelleschi drank wine all day. Sure he basically invented pulleys and designed the sickest dome in human history, but he was a drunk and I can't blame him because architecture and all of math is a joke if you look close enough.
In ancient city of Rome, it was more expensive to rent a room in multi-story building if the landlords lived in it as well. It showed that landlord was brave enough that the building will not fall one day onto themselves.