On January 1st of every year, new heritage works enter the public domain. However, oftentimes these works can still end up being inaccessible to the public, despite the fact that, legally speaking, nothing should prevent public access. In order to share experiences and best practices in opening up this material, we co-organise the annual Public Domain Day. In 2024, we will celebrate the public domain on 7 March, with numerous partners, local and international. We will use this day to discuss inspiring developments and use cases from Belgium and will take a look at the public domain through a European lens.