Lego Diagon Alley 75978 2025 Set. This large lego® harry potter™ diagon alley™ (75978) display model gives fans of the harry potter movies aged 16 and up a chance to recreate magical london’s most magical shopping street. Coming in at 5,544 pieces, 75978 diagon alley is second only in lego harry potter piece counts to 71043 hogwarts castle and, at £20 more, it’s now the most expensive.

Measuring over 11” (29cm) high, 40” (102cm) wide and 5” (13cm) deep, this lego® harry potter™ diagon alley™ set is crammed to the rooftops with authentic details. Coming in at 5,544 pieces, 75978 diagon alley is second only in lego harry potter piece counts to 71043 hogwarts castle and, at £20 more, it’s now the most expensive.