Chicago has over 100 years of pizza-related history because of course it does.

1909 After an influx of Italian immigrants, Pompei Restaurant opens in Little Italy on Taylor Street, starts selling thin-crust pizza.

1930s Granato's, one of the earliest pizzerias, opens on Taylor Street.

1939 The idea of pizza moves beyond the Italian neighborhood as the Chicago Daily Tribune reports about "Italian pizza" offered at Pizzeria Napolitana (opened in 1923) on Taylor Street, that is eaten "with the fingers."

1943 Pizzeria Uno opens on Ohio Street. The origin of deep-dish is hotly contested, but many say this place was it.

1947 Italian immigrants Vincent and Mary Grittani start making pizza at their bar — a sensation that will eventually become Home Run Inn.

1953 A Tribune story chronicles the rise of pizza, saying there are more than 100 pizzerias in the phone book.

1961 RIP Granato's: UIC campus construction knocks it down.

1965 Vito & Nick's, now a South Side staple, opens, helping popularize tavern-style crust.

1971 Lou Malnati's opens its original Lincolnwood location.

1986 McDonald's, based in Oak Brook, tests pizza as a menu item, but it never takes off.

1995 Giordano's Pizza opens its new flagship restaurant on Rush and Superior in Chicago.

1998 President Bill Clinton refuses to leave Chicago's O'Hare International Airport until he gets Pizano's pizza delivered to Air Force One.

2001 Piece Brewery and Pizzeria employs two members from MTV's "Real World: Chicago" cast, whose house was across the street at the time.

2005 "Saturday Night Live" regulars Jason Sudeikis , Andy Samberg and Bill Hader star in a skit featuring a three-layer taco, complete with Chicago-style deep dish pizza.

2005 Chicago magazine food editors Penny Pollack and Jeff Ruby publish "Everybody Loves Pizza: The Deep Dish on America's Favorite Food."

2008 Jimmy Kimmel visits Giordano's Pizza during a trip to Chicago as deep-dish pizza continues to gain nationwide fame.

2013 Jon Stewart trashes deep-dish pizza on "The Daily Show" (while unwittingly showing a stuffed pizza), calling it tomato soup in a bread bowl.

2015 Shonda Rhimes defends deep-dish, calling thin-crust pizza "disgusting."

2015 Piece launches the Atomic Pizza with Hot Doug's sausage as a tribute to the defunct hot dog shop. It's so popular it becomes a permanent fixture on the menu.

2016 New York gets Pizza Rat, Chicago gets Pizza Squirrel, a slice-eating cutie who had a Twitter moment.

2016 Homer Simpson chooses Chicago deep-dish pizza over New York's thin slices.

2016 Reports circulate that then-British Prime Minister David Cameron was having pizza at O'Hare in May 2012 when he agreed to grant voters a referendum on leaving the European Union .