Have you ever heard of the Boxer dog? They're medium sized, short haired dogs that originated in Germany. 
I think I've seen them before. Do they have squarish, boxy-type heads?
Yes! They are a "brachycephalic" breed, which means they have a broad, short skull, square muzzle, and usually an underbite. 
I do know those dogs! I had no idea they came from Germany.
They were actually bred from the Old English Bulldog and another breed, the Bullenbeisser, which is now extinct due to the crossbreeding. 
That's interesting. Dog breeding is a topic that always fascinated me. I had no idea that some breeds went extinct!
I always get excited when I "discover" a breed that's new to me, too. The Fédération Cynologique Internationale recognizes 337 different pure-bred dog breeds.