Lego Diagon Alley Instructions 75978 2025. Comprehensive information about lego 75978 diagon alley, a harry potter set released in 2020. Different instruction manuals are provided for each building and they also include information about the various shops.

Help topics view all help topics. 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.