Map of Europe: 1000 AD to present day
Unfortunately, it moves fast. But it does give one an interesting perspective on things.
Just seeing what Europe looked like before WW 2 was an eye-opener (it's when Germany become incredibly large), and then watching the German lands getting cut up to new nations. Very odd.
I can only imagine what it was like for the people who were in the changing-of-borders regions.
Some nations became large early on, while other regions were nothing but fractured clutters. It's all very odd.