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 Purple Gang. Mug shots of Purple members George Lewis, Eddie Fletcher, Phil Keywell and his younger brother Harry, were picked out by landladies Mrs. Doody and Mrs. Orvidson, who had taken in three men as roomers ten days before the massacre; their rooming houses were directly across the street from the Clark Street garage. Later, these women wavered in their identification, and Fletcher, Lewis, and Harry Keywell were all questioned and cleared by Chicago Police. Nevertheless, the Keywell brothers (and by extension the Purple Gang) would remain ensnared in the massacre case for all time. Many also believed what the