The first known written documentation of the world “Pizza” is from 997 AD.In was found in a manuscript from Gaeta, an Italian town. According to the USDA, about 1 in 8 Americans consume pizza on any given day. The most expensive pizza in the world is made from Renato Viola, Master Pizza Chef. It costs almost $9,000.The world’s largest pizza is 131 feet in diameter. For the past 50 years, the price of a New York City slice of pizza has matched, with uncanny precision, the cost of a NYC subway. It’s called the Pizza Principle.