Pizza, a simple yet delicious food consisting of oven-baked, flat dough topped with mozzarella cheese, tomato sauce and various other toppings, is a subject of obsession. Pizza from the Latin verb "pinsere" meaning "to press" is Greek in origin. The resourceful ancient Greeks covered their bread in oils, herbs and cheese. Modern pizza originated in Naples when Italians added tomato to their pies. Philadelphian Italians have continued to the tradition of mind blowing delicious pizza pies right here in the city of brotherly love. Whether your looking for a two dollar slice at 3am or want to ball out on pizza at a posh eatery, Philadelphia has so many options. Here is your official guide to Philadelphia pizza pies. Buon appetito!