I wouldn't call that extraordinary diversity - these are all Western European. I note you've added a new caveat "for a European country" as a get out of jail free card, but this "diversity" is extremely long-standing and, still, exists within Western Europe, the cradle of a hilariously disproportionate percentage of all of the social, civic, scientific, and technological advances the world has ever seen.

OK, you probably have a point. As they say, once you've seen the La Tène cultural package....