Go Back to Hogwarts with Harry Build a magical fantasy realm with the LEGO Harry Potter Hogwarts Great Hall. Featuring 878 pieces to detail Harry's Hogwarts adventures, this building block set creates four levels with the Grand Staircase tower, potions room, treasure room and more. Extras and accessories include Basilik and Fawkes creatures, the Mirror of Erised, the sorting hat and 10 minifigures.