The weekend 18-19 January 2020 I visited Brickvention in Melbourne. It was an amazing experience with 300 exhibits and expectedly 22,000 visitors. This makes it Australia's premier LEGO Fan convention. This post covers the exhibits I saw that were Harry Potter related and really shows the skills of the builders exhibiting there.
Back in September 2019 I visited Skærbæk Fan Weekend in Denmark. It is the biggest LEGO Fan Convention in Europe with more than 1000 LEGO Fans attending the convention and bringing along some really awesome displays. Here's an overview of the models that covered the Wizarding World of Harry Potter universe in some way.