From looking at ads of the era, Regas estimates that the first dedicated pizzeria opened in 1906 in Chicago and sold a pie similar to Neapolitan, which was being served in New York.

It is the first time in its 50-year history that Lou's has offered a white pizza on the menu and the company said it is excited to share it with hungry fans.

8. Capri di Nuovo. 8340 W. Beloit Rd., West Allis, (414) 543-5510 capridinuovo.com. The pizza at Capri di Nuovo was undeniably tasty. But it isn’t a classic Chicago style deep dish.

There, the tradition of deep dish is also alive and well, but you can also order thin crust. In the 1950s, Sewell purchased a second building to keep growing his pizza business.

But deep dish doesn't surprise and delight most native Chicagoans. When locals go out for pizza it's usually for thin-crust tavern-style pizza, which is it’s truly one of the best Chicago dishes ...

The hearty Chicago deep-dish pizza is a formidable animal, and as such, it requires a longer-than-average time in the oven to cook all the way through (about 30 minutes).