I did a search and nobody's mentioned this.
Although its been years, when I used to go to Germany on TDYs I've had a few of their pizzas, and the thing I remember is that they don't mix the toppings! In other words, if you order a pie with pepperoni, sausage, and mushroom, one-third of the pie has the pepperoni, one-third has the sausage, and one-third the mushroom (sauce and cheese covered the whole pie, iirc).
I was disappointed to see this the first time, but it actually is kinda neat to eat, it's almost like you're trying different pizzas and it gives the ol' taste buds a jolt.
Does anyone make pies like this?