The anniversary should not be a “mourning ceremony”, but a “big party” – this is how the Luxembourg Minister for Home Affairs in January 2025 envisioned the upcoming 40th anniversary of the signing of the Schengen Agreement.* 40 years ago, it initiated the gradual abolition of controls at the EU’s internal borders and has proven to be a European success story ever since. The agreement, which was concluded on 14 June 1985, initially between Belgium, France, Luxembourg, the Netherlands, and the Federal Republic of Germany, has been signed by 29 countries to date.