I swear that London used to have a palace situated on a bridge. I've been googling around this morning and I think I might have been thinking of Nonsuch House, which was on the old London Bridge. Four storeys and built in 1579, I've also just learned that Nonsuch House was the first recorded pre-fab building in history, having been built and then dismantled in the Netherlands and then shipped over to London where they put it back together again.
The reason I've been thinking about all this comes down to an old picture I once saw of London Bridge with this palace on it, and all these other buildings stacked around it too, fairly crowding off the bridge itself in every direction and hanging out over the water. It's exactly the kind of look that Pile Up! traffics in, and I'm getting quietly hooked on Pile Up! at the moment. (That said, I'm going to skip the exclamation point from now on because it keeps bodging up my typing.)
I first read about the game on RPS, where Katharine Castle referred to it as a sort of spin on Townscaper with a bit more actual game to it. That's spot on. Another way of putting it might be: it's Townscaper but everyone's furious with you from the start.