Pizza is a type of food that was created in Italy. It is made by putting "toppings". Some of the most common toppings are cheese, sausages, pepperoni, vegetables, tomatoes, spices and herbs and basil. These toppings are added over a piece of bread covered with sauce. The sauce is most often tomato-based, but butter-based sauces are used, too. The piece of bread is usually called a "pizza crust". Almost any kind of topping can be put over a pizza. The toppings used are different in different parts of the world. Pizza comes from Italy from Neapolitan cuisine. However, it has become popular in many parts of the world.