The second largest chain in Chicago, Rosati's Pizza is a chain pizza restaurant that offers more than 139 locations in the United States. This company offers a number of different types of pizzas, including thin crust, double dough pizza, Chicago deep dish, calzones, sandwiches, salads, a number of different pastas, desserts and more. Rosati's Pizza also caters different events. They are known primarily for their Chicago style pizza as well as their double dough and stuffed pizzas. They own a small sausage manufacturer that supplies the Rosati's Pizza locations which helps keep costs lower than other chains.