
Neapolitan pizza: Neapolitan pizza has UNESCO status, and there's an association in Italy that promotes and protects the simple, delicious dish. Click through the gallery for more photos of beloved pizza types:

Pizza al taglio: "By the slice," or al taglio, looks a little different in Italy, where the slices are rectangular.

Pizza tonda: This Roman-style pizza is thin and crispy.

Pizza fritta: In Naples, fried pizza, or pizza fritta, is sometimes sealed and fried in the shape of a calzone.

Sicilian pizza: Sicilian-style pizza has a thick crust that is similar to focaccia.

Wood-fired pizza: Available in many corners of the world, this is more a method of cooking than a distinctive style, says one expert. But it's frequently touted by pizzerias.

Detroit pizza: A pizza from Michigan & Trumbull in Detroit showcases this regional style featuring sauce ladled on top of the cheese.

New Haven pizza: Called "apizza," this pie style hailing from Connecticut features crust typically made crispy from a coal-fired oven. This pizza is from Frank Pepe Pizzeria.

Chicago deep dish pizza: A worker prepares a Chicago-style deep dish pizza at a Lou Malnati's restaurant in Chicago. A marker of this style is dough pressed up along the sides of the pan.

Tarte flambée: France makes plenty of traditional pizza, but its tarte flambée is a relative, often topped with crème fraiche, cheese, onion and bacon.

Catalan coca: In the Catalonia region of Spain, this creation akin to pizza is often topped with roasted vegetables.

Lahmacun: This ground-meat creation is found everywhere from the alleys of Istanbul and Yerevan to the streets of Berlin and Hamburg.

Khachapuri: Another take on dough topped with savory goodness, khachapuri is a filling meal in Georgia and Armenia.

New York slice pizza: Fold and go. That's how New Yorkers eat their pizza by the slice.


