Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A pizza is an oven-baked, flat, round bread which is typically covered with tomato sauce, cheese and various toppings. Pizza was invented in Naples and has become popular around the world. Some restaurants, known as pizzerias, have specialized in the preparation and sales of pizzas... Learn more about the pizza, its origin, and the various multinational chains of pizzerias with the help of this book.