Why is pizza called pizza?

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Tags

1. #others
2. #shape
3. #tomato
4. #reminiscent
5. #abound
6. #sustain
7. #baked
8. #claims
9. #because
10. #however
11. #triangles
12. #different
13. #simply
14. #called
15. #claim
16. #italian
17. #pizzas
18. #round
19. #theories
20. #first
21. #pizza
22. #chart