There are not too many nations that can say their national dish has become an international phenomenon. Italy has two such dishes, pasta and of course pizza. In America pizza usually falls into two categories: thick and cheesy Chicago style or thin and more traditional New York pizza. In Italy pizza also falls into two distinct categories: Italian pizza and the rest of the world.
Several cultures including the Greeks and Phoenicians ate a flatbread made from flour and water. The dough would be cooked by placing it on a hot stone and then seasoned with herbs. The Greeks called this early pizza plankuntos and it was basically used as an edible plate when eating stews or thick broth.
The word "pizza" is thought to have come from the Latin word pinsa, meaning flatbread.
A legend suggests that Roman soldiers gained a taste for Jewish Matzoth while stationed in Roman occupied Palestine and developed a similar food after returning home.
The introduction of the Indian Water Buffalo gave pizza another dimension with the production of mozzarella cheese. Even today, the use of fresh mozzarella di buffalo in Italian pizza cannot be substituted.
The introduction of tomatoes to Italian cuisine in the 18th and early 19th centuries finally gave us the true modern Italian pizza. The innovative peasants of Naples started using the supposedly deadly fruit in many of their foods, including their early pizzas. Once members of the local aristocracy tried pizza they couldn't get enough of it, which by this time was being sold on the streets of Naples for every meal. As pizza popularity increased, street vendors gave way to actual shops where people could order a custom pizza with many different toppings. By 1830 the "Antica Pizzeria Port'Alba" of Naples had become the first true pizzeria and this venerable institution is still producing masterpieces.
The popular pizza Margherita owes its name to Italy's Queen Margherita who in 1889 visited the Pizzeria Brandi in Naples. The Pizzaioli (pizza maker) on duty that day, Rafaele Esposito created a pizza for the Queen that contained the three colors of the new Italian flag. The red of tomato, white of the mozzarella and fresh green basil was a hit with the Queen.