Today, a truly memorable day in Bruins history. (VIDEO)

On this day in Bruins history, the number 4 was raised to the rafters honoring arguably the greatest defenseman to ever play the game. Hockey icon. legend, and Hall of Fame inductee Bobby Orr's number was retired during an exhibition game between the Boston Bruins and the Soviet Wings in 1979. We know that a lot of our fans were too young to have witnessed the historic event live so today we're bringing you the entirety of his retirement ceremony, both for those who wish to watch it for the very first time, as well as for older Bruins fans looking for a trip down memory lane. Truly one of the most memorable moments in bruins history.