Thus, Chicago style pizzas are built in the following order: crust, cheese, toppings, tomato sauce. Thin slices of pizza can only hold so many toppings before they collapse or get soggy. But a deep=dish pizza has room for a larger quantity of toppings, because the crust is sturdier

Chicago-style pizza usually refers to deep-dish pizza, which is a thck pizza bakes in a  pan and layered with cheese, fillings like meat and vegetables, and sauce-in that order.

Although the entire pizza is very thick, in traditional Chicago-style deep-dish pizzas, the crust itself is thin to medium in thickness. Deep-dish pizza is baked in an iron skillet or a round, steel pan that is more similar to a cake or pie pan than a typical pizza pan.