Pizza ( / ˈ p iː t s ə /, Italian pronunciation: [ˈpittsa] ) is an oven -baked, flat, round bread typically topped with a tomato sauce, cheese and various toppings. Pizza was originally invented in Naples, Italy, and the dish has since become popular in many parts of the world. An establishment that makes and sells pizzas is called a "pizzeria". Many varieties of pizza exist worldwide, along with several dish variants based upon pizza. In 2009, upon Italy 's request, Neapolitan pizza was safeguarded in the European Union as a Traditional Specialty Guaranteed dish. Also, October is traditonally national Pizza month.