I'm looking at a house right now (Philly suburbs) that was built in 1849. Everything is level and plumb, which I've never seen before in a house that old. Most fucked-up layout I've ever seen: you go up the stairs and right into the bathroom, and then you access the two bedrooms from the bathroom (the house originally didn't have a bathroom at all, of course). It's one thing to be banging on the bathroom door because you have to go, but another to be banging on the bathroom door because you have to go.