A woman looks at the Lego Sagrada Familia as she places the final tower on top of it. Lego has produced many massive kits over the years, but now it's outdone them all with its largest ever set. The Lego Sagrada Família, due to launch on November 1, is an eye-watering 12,000+ pieces strong. That officially makes it 1,000 pieces larger than the previous record holder, the now-retired Lego Art World Map, and bigger than most of the best Lego sets combined.