Siduri, what I'm actually asking is if there really is some thing called pizza.
I know it's origins, and the way it was made in Naples. And I know what was meant by pizza when I was growing up. Pizza (or pizza pie, as it was called):
1. Was purchased in an Italian restaurant that mostly specialized in it, although other dishes were available. If you grew up in New York (as I did) you could also buy it as locations that specialized in selling it by the slice. There were no chains in those days.
2. Was built on a yeasted flat bread which was formed by stretching, not rolling. This produced a thin, slightly chewy crust, usually with a thicker bread-line ring around the edge.
3. Had a limited number of toppings. These always included tomato sauce and mozzarella cheese. Other common ones were pepperoni, mushrooms, and assorted veggies. And, of course, anchovies.
In short, it was one variation or another of Neopolitan pizza. No problems.
When I lived in Boston, a similar condition prevailed. Naturally, being a New Yorker I wasn't allowed to admit it, but some of the best pizza I've ever eaten was in the North End.
So, I thought I knew what pizza was.
Then I moved to the Chicago area. First time we had pizza it was unusual. The crust was thin, crispy, and had no bread edge. It was cut in little squares instead of wedges as it's supposed to be. And the less said about the toppings the better. And we discovered that thing called deep dish pizza. Deep dish, as I've said before, can be very tasty. But to me it's a casserole, not a pizza. Others, obviously, disagree.
And then I visited southern California, and was exposed to things like pizza topped with Canadian bacon and pineapple, and a host of other weird toppings. And the crust was usually rolled, rather than stretched, giving it a totally different consistency.
Now, on this thread, we have a number of opinions that are so diverse as to make the word "pizza" meaningless as a specific culinary term.
When you were in Turkey did you get to enjoy lamejun? Seems to me, most of the participants on this thread would consider that to be a pizza.