Not sure what you mean by historic home, but if you literally mean it's listed on the registry of historic homes or it's located in a historic district, it's pretty important that you know what that actually means for the house you're looking at. It's sort of like buying something with a HOA. Often it comes with rules like you can't update certain things or you can only reside your house with wood and it has to be the same color as the old siding. I have friends who own houses like that and it's a struggle.

If that isn't what you mean, and really you just want something 100+ years old, please ignore this comment!