We used to smoke weed on the roman wall behind my friend’s high school. Very popular hangout spot. Lots of people using it for rock climbing practice (you’re not far off the ground and can climb laterally for hundreds of meters).
The local castle, about 1000 years old, is a popular makeout spot for teens.
Anyway yes we have some comparatively old stuff here, you get used to it quickly. Colleague lives in cca 400 years old house, nothing special. Just more building restrictions, not because its somehow protected but simply due to meter-thick stone walls and corresponding architecture, statics and so on. One couldn't tell if its 100 years old or 400 from outside. After renovation even less (it was a farm house before, so french state doesn't feel the urge to interfere with his property).
Wifi must be a nightmare. Very interesting to think about. Every building I've lived in is plaster and wood beams and I get annoyed when audio starts dropping / distorting on BT earbuds at a distance.