The Hungarian Yearbook of International Law and European Law comprises a collection of articles written mainly by Hungarian authors, covering developments in the field of international law and EU law, and progress in the domestic implementation and application of these fields of law. The thematic chapter of Vol. 11 (2023) deals with the past, present, and future of Union citizenship, while the Anniversary section is dedicated to the 100th anniversary of the foundation of the International Law Association (ILA) Hungarian Branch. Vol. 11 (2023) contains a special chapter dedicated to the international protection of minorities, which we hope will become a permanent chapter in the Hungarian Yearbook. The Yearbook also contains numerous articles on new developments in European law and international law, Hungarian state practice, case notes and book reviews. The Yearbook offers a comprehensive picture of the state of application and implementation of international law and EU law in Hungary. This publication was supported by Pallas Athéné Domus Meriti Alapítvány.