Chicago Pizza and Oven Grinder Company Chicago Pizza and Oven Grinder Company Chicago Pizza and Oven Grinder Company is a restaurant located in Chicago, Illinois. The restaurant was founded in 1972, and specializes in a signature dish called the "pizza pot pie." It enjoys local popularity and has appeared in many publications and television shows. There is no knowledge of when the building was first built. It has been speculated that the building had some ties to gentility, but those ties were severed in 1929. The parking garage across the street became known as the location of the "St. Valentine's Day Massacre", the infamous murder of
Saint Valentine's Day Massacre that both machine guns be brought there at once. Through the then relatively new science of forensic ballistics, both weapons were determined to have been used in the massacre – and that one of Burke's Tommy guns had also been used to murder New York mobster Frankie Yale (who participated in O'Banion's murder) a year and a half earlier. Unfortunately, no further concrete evidence would surface in the massacre case. Burke would be captured over a year later on a Missouri farm. As the case against him in the murder of Officer Skelly was strongest, he was tried in Michigan