Ike Sewell, the man credited with creating the "Chicago deep dish pizza," died Monday. He was 86.

Sewell, who introduced deep dish pizza to the Midwest during World War II, died Monday at Northwestern Memorial Hospital, hospital officials said. The cause of death was not released.The businessman opened Pizzeria Uno in 1942 with his longtime partner, Ric Riccardo, in the basement of a small building in downtown Chicago.

Sewell served his deep dish pizza in the basement for nearly 40 years before finally buying the building in 1982.