Who invented pizza?

Supposedly in Naples, Italy.

Considered a peasant's meal in Italy for centuries, modern pizza is attributed to baker Raffaele Esposito of Napoli (Naples) in the Italian region of Campania. In 1889, Esposito of Pizzeria di Pietro (now called Pizzeria Brandi) baked pizza especially for the visit of Italian King Umberto I and Queen Margherita.

The first pizzas were made in Italy around the 1800s, they were called 'Neapolitans' and were traditionally made with mozzarella, fresh tomatoes, and basil and baked in a stone oven. The rest of the world didn't catch on until after the 2nd World War.

The Greeks, on the other hand, claim that they invented the pizza, the name being a corruption of the Greek word pitta for a type of bread.

The French have also claimed responsibility for inventing the pizza (it was called pissaladiere). But none of these mentioned would be recognisable as a pizza. On June 19, 1889, a pizza maker known as Raffaele Esposito invented the pizza as it is known today, by adding cheese an basil to the standard dough and tomatoes and named it Pizza Margherita in honor of Queen Margharita of Savoy.

The pizza could have been invented by the Phoenicians, the Greeks, or The Romans or anyone, in fact, who learned the secret of mixing flour with water and heating it on a hot stone. In one of its many forms, pizza has been a basic part of the Italian diet since the Stone Age. This earliest form of pizza was a crude bread that was baked beneath the stones of the fire. After cooking, it was seasoned with a variety of different toppings and used instead of plates and utensils to sop up broth or gravies. It is said that the idea of using bread as a plate came from the Greeks who ate flat round bread (plankuntos) baked with an assortment of toppings. It was eaten by the working man and his family because it was a thrifty and convenient food.
http://whatscookingamerica.net/History/Pizza/PizzaHistory.htm

Many have speculated that pizzas could have originated from matzah meals. Back in Talmudic times matzot (plural of matzah) didn't look at all like what comes in the Manishevitz boxes today, and was actually more like unleavened pita bread or laffah, as it is known in modern Hebrew. Rabbi Hillel was noted for taking this matzah and bitter herbs and eating them as a sandwitch, or a calzone more accurately. Just change bitter herbs to tomato sauce and you've got the beginnings of a pizza.

Pizza is one of those foods for which we will never know a specific origin. For one thing, the definitions of pizza are many and varied. Putting stuff on flat bread as a meal certainly goes back as far as ancient Rome. The word "pizza" itself appears just before 1000 AD, in the area between Naples and Rome, meaning "pie."

http://www.straightdope.com/mailbag/mpizza.html

Perhaps in Virgil's boudoir.

"Their homely fare dispatch’d, the hungry band
Invade their trenchers next, and soon devour,
To mend the scanty meal, their cakes of flour.
Ascanius this observ’d, and smiling said:
“See, we devour the plates on which we fed."

There are three main countries which claim to have invented pizza: Italy, Greece and the United States.

And ancient Israel, who are said to have made pizzas for the purpose of the Passover seder. (The crust would not be leavened, and some rabbis tended to put topings on it.) One possibility is that the Romans picked up this little custom and found it appetizing the whole year round.

Pizza, like so many other foods, did not originate in the country for which it is now famous. Unless you have researched the subject, you, like so many people, probably always thought Pizza was strictly an Italian creation.

The foundations for Pizza were originally laid by the early Greeks who first baked large, round and flat breads which they topped with various items such as olive oils, spices, potatoes and other things. Tomatoes were not discovered at that time or, very likely, they would have used them as we do today.

https://en.wikipedia.org/wiki/History_of_pizza
http://www.pizzafacts.net/pizza-history/pizza-timeline/