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On Tuesday 17 October 2017 Alexandre Genest defended his PhD dissertation ‘Performance Requirement Prohibitions in International Investment Law’ as part of a double PhD programme at the Universities of Leiden and Ottawa. The Supervisors are Professors M.E. Koppenol-Laforce. F. Baetens (Universities…

The main objective of the Telders International Law Moot Court Competition is to challenge students to excel in international law, consequently testing their creativity and powers of persuasion in a friendly competition. Students and academic staff throughout Europe consider participation to be a great…

Leiden Law Practices (LLP)

Organized by the Grotius Centre for International Legal Studies, this programme enables students and professionals from all over the world to engage in discussions on the prospects and challenges of international criminal justice. Registration is now open!

On 18 July, Olga Ceran held a presentation titled ‘Family law in a united Europe: Child abduction and child relocation’ at a summer school on 'European integration at the Franco-Spanish border: A cross-border perspective' which took place at the Cité des Arts in Bayonne (France).

The December 2022 issue of the Common Market Law Review, Vol. 59 No. 6, is now available online.

PhD defence

The Institute of Criminal Law and Criminology is committed to international cooperation and exchange.

A team of students from the Advanced LL.M. in Air and Space Law represented Leiden University at the Manfred Lachs Space Law Moot Court Competition. The European regional rounds of the competition took place at the headquarters of the European Space Agency in Paris, France from 1 to 3 April 2025 and…

On 25 March 2021 this online seminar will be held from 10.15-12.00 at Örebro Universitet in Sweden. Jannemieke Ouwerkerk, Professor of European Criminal law at the Institute of Criminal Law and Criminology at Leiden University, will be one of the speakers at this seminar. Information about registration…

This project looks at the current practices of marriage law in Indonesia. It examines the often ambiguous views different groups hold of marriage, from local villagers in Bengkulu to women’s activists in Jakarta, and how these relate to the development of national law on the one hand and local practices…

On 18 December 2019, Mikhail Antonov defended his thesis 'Formalism, Realism and Conservatism in Russian Law'. The doctoral research was supervised by Prof. W.B. Simons.

Are you thinking about studying Air and Space Law ? Learn more and watch the videos.

On Thursday 20 October 2016, the 2nd annual Common Market Law Review conference “Crossing Europe’s Borders - New approaches to migration in European law

The revolutionary organizations in Paris and Berlin around 1848.

From deepfakes and disinformation to killer robots, surgical robots and AI lawmaking: AI (Artificial Intelligence) is changing our world. That raises the question whether this requires some form of regulation. At eLaw, the Center for Law and Digital Technologies at Leiden University, prof. Bart Custers…

This volume was edited by Jeroen Duindam, Jill Harries, Caroline Humfress, and Nimrod Hurvitz.

Leiden University opened its doors in 1575 – the very first university in the Netherlands. The law faculty was involved from the start and so in 2025 they, too, were celebrating their 450th anniversary.

Mental health issues in the Dutch court: The criminal court as a border guard between the regular Mental Health System and the Criminal Justice system?

Madeleine O. Hosli & Jaroslaw Kantorowicz analyze EU states' foreign policy divergence at the UN General Debate, assessing if Lisbon Treaty reforms increased EU cohesion or if states maintain distinct positions.

Are you thinking about studying the Advanced LL.M. Civil and Commercial Law? Learn more and watch the videos.

The Faculty of Law is becoming more sustainable in many ways, both in teaching and research.

Are you thinking about studying the Advanced LL.M. Law and Digital Technologies? Learn more and watch the videos.

Published by Brill Nijhoff and written by leading experts including national judges, academics and practitioners East African Community Law is the first comparative as well as open access textbook on EAC law. The book provides a key resource for the research, teaching, and practice of EAC law. It also…

The Leiden student team representing the International Institute of Air and Space Law (IIASL) won the Best Memorials Award and the second place in the European Finals of the Manfred Lachs Space Law Moot Court Competition.

The Role of Law in Libya’s National Reconciliation (RoLLNaR) was a research project that ran from 2017 to 2020. It identified and assessed the role of law – both actual and potential, enabling and constraining – with regard to major challenges of reconciliation in Libya. The project was led by Dr. Suliman…

Migration and crime are in the spotlight in society. Within the Institute for Criminal Law and Criminology, research in this area has strongly developed in recent years. The concept of Crimmigration is central to this.

In important cases before the Court of Justice of the European Union (ECJ) in Luxembourg, judgments are preceded by an Opinion of an advocate general. These Opinions are not binding on the Court, but are highly influential in practice.

The Institute for Philosophy at Leiden University is host to the NWO programme,

In this article, Seda Gürkan & Rosa Sanchez Salgado show which emotions the Members of European Parliament (MEP) expressed in the wake of Qatargate.

Between 11 and 13 September 2025, the ESIL Annual Conference took place in Berlin, Germany. This year's conference unfolded on the theme 'Reconstructing International Law', attracting an unprecedented number of legal scholars from all over the world.

Whilst government’s ability to design ‘context-specific’ regional innovation policy is generally assumed to depend on the region’s decision-making power, the aim of this study is to investigate how regional government matters. In order to open up the black box of policy design, the study develops a…

The handbook is a wide-ranging survey of a crucial period in prehistory during which many social, economic, and technological changes took place. Written by specialists in the field, the book provides coverage both of the themes that characterise the period, and of the specific developments that took…

On Tuesday 23 May 2017, Jasmina Mackic defended her doctoral thesis ‘Proving discriminatory violence at the European Court of Human Rights’. The supervisor of the research is Vice Dean and Professor of Public International Law Larissa van den Herik. A brief summary of her thesis is provided below.

What is a good data protection law? How does a good data protection law evolve? Is European data protection law a good one? And whether the European data protection applicable to China?

This book is the first comparative study of estimative intelligence and strategic surprise in a European context, complementing and testing insights from previous studies centred on the United States. It does extensive empirical analysis of open-source material and interviews in relation to three cases…