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…

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.

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

Dr. Gruni published an article on the impact on sustainable development in the EU Common Commercial Policy of recent Opinion 2/15 CJEU on the Global Trade and Customs Journal.

Leiden Law Practices (LLP)

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.

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…

How to explain the apparent high success rates of the EU infringement procedures, which are the major tools for enforcing EU law, against the member states?

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?

Assistant Professor Space Law Tanja Masson-Zwaan appeared as a guest on the Radio Weetlust programme of local Leiden radio station Sleutelstad FM. She talked about, among other things, who does the moon actually belong to and why we all would like to go there so badly.

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.

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…

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

This book explores the relationship between the production of new urban spaces and illiberal community-making in contemporary India. It is based on an ethnographic study in Noida, a city at the eastern fringe of the state of Uttar Pradesh, bordering national capital Delhi.

Antibiotic-resistant bacteria pose a major health threat. Addressing this challenge requires among others the development of new antibacterial compounds. The research described in this thesis focuses on discovering novel antibiotics from soil bacteria, specifically Streptomyces and Paenibacillus.Despite…

2025 was a year to remember at our faculty. We celebrated our 450th anniversary, launched new degree programmes and welcomed many inspiring speakers, yet we also felt the weight of budget constraints. Our year in a nutshell:

The tuition fee for the programme depends on a number of factors, such as your nationality and your previous Dutch higher-education qualifications.

Leiden Law School has a long tradition of research in Air Law and, of more recent vintage, in Space Law.

The individual in the EU: The application of insights from social psychology to improve the legitimacy and conflict-solving capability of the EU

On 25 January 2024 H.J. Pak successfully defended a doctoral thesis and graduated.

News

This article studies the perceived legitimacy of EU enforcement actions.

While outer space has been explored peacefully for decades, clear rules on lunar mining are lacking. Space law expert Tanja Masson-Zwaan told the BBC that international cooperation is urgently needed to prevent conflict and legal uncertainty.

This volume provides an authoritative, cutting-edge resource on the characteristics of both technological and social change in warfare in the twenty-first century, and the challenges such change presents to international law.

What are the rights of migrants in Morocco and how do this receiving state and migrants deal with them in practice?

How can legal education in Indonesia become more relevant for graduates who will work in contexts of legal pluralism, aiming for social justice and providing legal services that common citizens need?

Most people know what law is. But what it should be or where it comes from is what interests the researchers from the Institute for the Interdisciplinary Study of the Law. Key to their approach are topics that go right to the heart of philosophy of law. What is a state? What are the limitations of…

On Wednesday 13 December 2017 Jaap Wieland defended his doctoral thesis entitled ‘De bescherming van concurrentiebelangen in het bestuursrecht’ (the Protection of Competition Interests in Administrative Law).

In our European and International Business Law Advanced Master programme, you learn to decipher the hierarchy of European & international business law