The leading chain pizza restaurant was founded in Wichita, Kansas
Pizzeria Uno in Chicago invents the deep dish pizza, sparking the still unsettled debate of whether a casserole can really be a pizza.
Immigrants to New York in the 1940s brought along the Neopolitan delight that is pizza.
King Umberto and Queen Margherita of the newly unified Italy visit Naples and the Margherita pizza gets its name.
