City of Pittsburgh firefighters march down Boulevard of the Allies on Saturday, March 16in the annual St. Patrick’s Day parade. (Photo by Carson Folio)Horses lead a float in the annual parade that drew in about 200,000 attendees. (Photo by Carson Folio)Several live animals sit atop a parade float. (Photo by Carson Folio)The city of Pittsburgh has been celebrating St. Patrick’s Day with their annual parade for over 150 years. (Photo by Carson Folio)