If you have German ancestors, you already know about border changes and tiny kingdoms that changed continuously through history, and by whether ruled or free, or city, etc. Here's another helpful tool to puzzle out what was where and when. Map of Germany
Rothenburg ob der Tauber, Bavaria, Germany - You expect this village to look this way since this is a prime tourist stop but the beauty of Europe is that you will find villages like this everywhere you go. It is as if the walls surrounding these villages have somehow kept time from creeping in. We loved it.