Just visited Berlin, which is a good place for map nerding:
^ German Historical Museum. I was a little disappointed with their presentation on the Thirty Years War, though, felt kinda brief for something that was so especially cataclysmic to Germany. It did provide some interesting perspective on the Napoleonic Wars and how they kind of gave rise to a national consciousness for a German state that didn't exist so much until they found themselves under a Napoleon-like threat.
Picked up this book:
Historischer Weltatlas, which seems better than any English historical atlas I've ever seen. Got that, and a nice large print of Europe in 1910, at
Schropp which dealt mostly in more modern maps, but the woman there directed me to a smaller store that dealt almost entirely in antique maps. Upon arrival I discovered that most of them were original prints because they were expensive as hell (like, 1k euros on average). Looking through their catalogue I think they had one old atlas for 120k euros, rofl.
Oh, and in a London Christmas market I randomly came across a booth for this place:
Old Maps Library
Their prints are on pretty nice paper (well, linen), gf approved of getting this one for our apartment since it had pictures on the side: