Pizza is a $30 billion industry in the United States, with an average consumption of 46 slices per person annually. Originating in Naples in the late 1700s as a simple flatbread dish for the working class, pizza was initially considered a peasant food until Queen Margherita popularized it in 1889. The first documented pizzeria in the U.S., G. Lombardi's, opened in 1905, marking the start of pizza's rise in American cuisine.