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 Patrick's Day in the United States Century. Many people choose to wear green colored clothing and items. Traditionally, those who are caught not wearing green are pinched "affectionately". Seattle and other cities paint the traffic stripe of their parade routes green. Chicago dyes its river green and has done so since 1962 when sewer workers used green dye to check for sewer discharges and had the idea to turn the river green for Saint Patrick's Day. Originally 100 pounds of vegetable dye was used to turn the river green for a whole week but now only forty pounds of dye is used and the color only