I used to work at Domino's.  It's a classic American Pizza chain.  Although pizza was invented in Naples.
I would have eaten so much pizza. Ive heard of something called Neapolitan pizza. Is that something different?
Indeed it is.  It's a form of pizza made specifically with Tomatoes and Mozzarella Cheese.
I would love to go to Naples and eat some authentic Neapolitan pizza. 
Me too.  It's actually a bigger city than I thought.  Over 3 million people!  It's actually the 9th most populated city in the EU.
Oh wow. Is pizza popular anywhere else besides Naples and the United States?
History of pizza
The history of pizza begins in antiquity, when various ancient cultures produced basic flatbreads with several toppings.
A precursor of pizza was probably the focaccia, a flat bread known to the Romans as , to which toppings were then added. Modern pizza developed in Naples when tomato was added to the focaccia in the late 18th century.
The word "pizza" was first documented in 997 A.D. in Gaeta and successively in different parts of Central and Southern Italy. Pizza was mainly eaten in Italy and
Neapolitan pizza
Neapolitan pizza (Italian: "pizza napoletana") also known as Naples style pizza, is a style of pizza made with tomatoes and mozzarella cheese. It must be made with either San Marzano tomatoes or Roma tomatoes, which grow on the volcanic plains to the south of Mount Vesuvius, and Mozzarella di Bufala Campana, a protected designation of origin cheese made with the milk from water buffalo raised in the marshlands of Campania and Lazio in a semi-wild state. Neapolitan pizza is a Traditional Speciality Guaranteed (