German pizzas are almost always Italian, thanks to the Italians who came to Germany in the 1960’s and stayed. Most often, the staff will speak Italian in the kitchen, and some of them will be seasonal help that take the money earned in Germany back home after a few years.
American pizza for a long time only available from Pizza Hut, which you could only find in larger cities. Only last year did I find a Dominos in Munich, and they don’t deliver to my address (I am only 200 metres out of their zone).
UPDATE: I just saw that the first pizzeria in Germany was opened in Würzburg in 1952, because American soldiers wanted pizza.
