http://www.historyfiles.co.uk/FeaturesEurope/Barbarian_Map52BC.htm
For your pagan history lessons: click the above link for an fantastic map of Celtic and Germanic tribes in the first centuries BC and AD (which I found because someone was kind enough to post it in the Facebook group of Heidenen van de Lage Landen). You can enlarge the map and click on names for more information.
For example, these are the tribes that once lived in what is now roughly the area of the Netherlands.
thimsternisse 