This is excellent. It’s a time-lapse map of European history, from 1000 AD to 2003. It’s really quite amazing to see countries or parts of them change so much. It’s rather saddening too – many, perhaps most, of the changes came as the result of war and the subsequent land-grab.
I’ve posted the longer by clearer version, which contains dates and further annotations. You can find the shorter versions here. Both are well worth viewing full screen for the full effect.