A Lego set based on the Roman Colosseum broke a Guinness World Record by being composed of 9,036 pieces. The Colosseum set, designed by a team led by Rok Zgalin Kobe, was verified by Guinness as being the largest commercially available Lego set. Watch: Lego's Colosseum set breaks Guinness record with 9,036 pieces: A Lego set based on the Roman Colosseum broke a Guinness World Record by being composed of ...