Large numbers of children all over the world face significant health risks, such as infectious and chronic diseases, malnutrition, injuries and the consequences of natural disasters, protracted armed conflicts and poverty.

If we want tax evasion to become a thing of the past then there has to be more balance in how tax advisers are educated, according to tax professors Jan Vleggeert and Jan van de Streek.

Four teams of students from the master's in European Law and the advanced master's in European and International Business Law (EIBL) programmes recently took part in this year's edition of the European Law Moot Court (ELMC). In the end, two teams qualified for the regional finals of the competition…

On 12 July, a workshop was held in hybrid format (on site and online) at the University of Reading in the UK on the subject of 'EU law teaching in the UK post-Brexit: Learning from EU law colleagues based in other non-EU states and seeking UK solutions'.

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…

In the EU Law Live podcast episode ‘Tax, gambling and the internal market’, Vincent Delhomme discusses the recent Admiral Gaming Network case, dealing with the validity under EU free movement provisions of national tax measures in the field of gambling.

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…

Armin Cuyvers, Stefaan Van den Bogaert and Veronika Yefremova taught in the course on History, Principles and Institutions. The online course took place within the context of the 2025 Summer School in European law for Ukraine, organised by the Kyiv Institute for European Integration and Concordia Un…

The majority of professors of tax law in the Netherlands have links to accounting and law firms, writes Dutch newspaper De Volkskrant.

During the second episode of this Leiden Law podcast, hosts Juli Wentholt and Ishana Badhai will talk with Tanja Masson-Zwaan about the latest developments in Space Law.

On 19 and 20 May an international labour law conference is taking place in Stockholm. The theme is ‘New Foundations of Labour Law in the Globalised Market Economy’.

On 9 and 10 November 2017 the thematic group of LERU Law Deans met at Leiden Law School to discuss developments in the field and collaborations between the partner universities. The meeting was organised jointly with Utrecht Law School.

EU Law Live is holding an online symposium on the theme of 'Climate Protection as a European Fundamental Right under the ECHR', with staggered online contributions.

Organised by the Common Law Society of Charles University, Prague, the summer school takes place during two weeks in July at the University’s mountain house 'Patejdlova bouda'.

On Tuesday 22 January 2019, Beryl ter Haar participated in a comparative law lecture featuring labour law cases of the constitutional court of South Africa at the Kutafin State Law University Moscow, Russia. Topics discussed included short term employment contracts, the right to strike and the right…

When a pupil applies for a place at a school and is admitted, a legal relationship is established between them. The exact nature of this legal relationship however is unclear. The law is silent in this area and case law provides no definite answer either. According to PhD Candidate Stijn Voskamp, contract…

Conceptualizing ceasefires as bargaining instruments challenges established ideas about the processes that lead up to conflict settlement, and about war re-emergence, with important implications for our understanding of war and peace.

The European Rule of Law Conference 2025, hosted by re:constitution at the Berlin Social Science Center (15-16 September), brought together scholars, practitioners, and civil society to critically examine the challenges facing democracy and the rule of law in Europe and to explore ways of shaping their…

After more than seven years as Managing Editor of Common Market Law Review, preceded by 22 years as Associate Editor and three years as Secretary to the Editors, Alison McDonnell will be retiring in December 2022.

On 30 November 2016, Cecily Rose participated in a Symposium held at the T.M.C. Asser Institute on 'A Court for the World? Trust in the ICJ 50 years after South West Africa'.

On Thursday 7 and Friday 8 December 2017, Leiden University’s Hazelhoff Center for Financial Law and the European University Institute in Florence jointly organized a PhD workshop in Leiden.

In 2012, Swedish power company Vattenfall went to an investor-state tribunal in response to the decision of Germany to close three Vattenfall nuclear power plants on its territory. The tribunal now has to decide whether Germany’s decision is in accordance with the international Energy Charter Treaty.…

On 10 October 2018 Maarten Aalbers presented his PhD chapter on the application of state aid law to the professional sports sector at the 8th International PhD Students' Conference on Competition Law at the University of Bialystok.

On 24 May, Iyiola Solanke, Jacques Delors Professor in EU Law at the University of Oxford's Faculty of Law and Fellow of Somerville College, gave the annual Europa Lecture organised by Europa Institute in Leiden Law School's historic Lorentz Lecture Hall. Her lecture was entitled ‘A decolonial approach…

On 19-20 October 2023, Europa Institute’s Simona Demkova and Melanie Fink, together with Giulia Gentile (Essex Law School), co-hosted an Expert Roundtable on the topic of ‘The Future of EU Public Law in the Age of Artificial Intelligence,’ in the context of the Digital Constitutionalism (The DigiCon…

On 12-13 April Rick Lawson took part in the event 'Democracy in Europe', organised by the Europaeum and hosted by the University of Bologna.

On 16 November 2018 Armin Cuyvers presented some legal strategies to soften the much criticized absolutist approach to autonomy by the European Court of Justice in Achmea. His main argument was that, as a general principle, autonomy can and should be weighed against other general principles.

On the 28th of January 2019 Beryl ter Haar gave an introductory lecture on EU labour law concerning collective redundancies and working time. Both are core issues of this year's case for the Hugo Sinzheimer Moot Court Competition.

A delegation of the Child Law Department has attended the World congress on family law and children’s rights in Dublin, from 4-7 June. This congress organised once in every four years was hosted by prof. Ursula Kilkelly (University College Cork). Over 600 people attended the congress; professionals…

On Friday, December 15th, Prof. Kevin Davis, Beller Family Professor of Business Law at NYU School of Law will, on the basis of his own research, reflect on whether, and if so how, we can measure law and legal phenomena.

On 10 June 2021, Merinda Stewart defended her thesis 'Freedom of Overflight: A Study of Coastal State Jurisdiction in International Airspace'. The doctoral research was supervised by Prof. P.M.J. Mendes de Leon en Prof. J.J. Rijpma.

This article on private active cyber defense by Dennis Broeders is part of a special issue of the Journal of Cybersecurity, based on a selection of contributions taken from the 2019 Conference on Cyber Norms organized by The Hague Program for Cyber Norms.

The article deals with the influence of the Agreement on the Free Movement of Persons between Switzerland and the EU on the international tax separation, more specifically on the tax separation of tax deductions for natural persons.

The newly established Luxembourg Centre for European Law held its inaugural conference on 10-11 October 2025, exploring the theme of “European Union law and values in a changing world”. Martijn was invited to speak about the relationship between European values and democracy.

The application window for the 26th ECSL Summer Course on Space Law and Policy is now open. The deadline for applicants to send their applications to you is 30 June 2017.

This book provides a comparative analysis of the process of breach across ten different European jurisdictions by identifying and elaborating a number of key analytical themes through which the different systems can be compared and evaluated.

Research conducted by the Department of Child Law and Health Law at Leiden University concerns the legal position of the child at both the national and international level.

On Wednesday 28 September 2022, the Opening Ceremony of the European Law LL.M. took place on campus at Leiden Law School. Following Dr Ben Van Rompuy and Professor Jorrit Rijpma’s warm words of welcome for the incoming students, Dr Vasiliki Kosta presented two student prizes from the preceding academic…

Het Internationaal Strafhof krijgt veel kritiek op haar tanende invloed als het gaat om gerechtigheid in Oekraïne en Palestina. Larissa van den Herik, hoogleraar internationaal publiekrecht, sprak met Trouw: ‘Internationaal recht is altijd in ontwikkeling en is altijd imperfect.’

Political scientist Corinna Jentzsch received an NWO Veni grant for her research on the conditions of collaboration between militias and state forces and its consequences for safety and political order.

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:

On 13 and Friday 14 July 2017 the International Congress took place in Porto, Portugal. The conference was bilangual with simultaneous translations between English and Portuguese/Spanish. In total there were about 350 participants from 23 different countries, however, most of the participants came from…

EuroScience Open Forum – ESOF - is Europe’s biggest multidisciplinary and prestigious scientific conference. ESOF2022 will take place from 13-16 July 2022 and is hosted by Leiden as the European City of Science (in the Netherlands). The Kamerlingh Onnes Building is one of the locations of the ESOF and…

How did disability become a global concern? In this project we will identify the contribution of international agencies, governmental and non-governmental organizations and, just as importantly, disabled people themselves, to the IYDP and by showing the connections, interactions and entanglements between…

Darinka Piqani visited the Law Faculty of the University of Tirana (Albania) on 16-20 January 2023 and lectured on the transparency and the right to information in EU law. These lectures were held in the context of the Research Expertise from the Academic Diaspora (READ) Fellowship that Dr Piqani holds…

Currently, the bill ‘Wet versterking waarborgfunctie Awb’ (strengthening the guarantee function of the Dutch General Administrative Law Act) is in preparation. The bill is intended to strengthen the human dimension in the execution and administration of justice.