This week the European Commission took a major step by starting infringement proceedings against the United Kingdom. The issue at stake is the contentious Internal Market Bill introduced by Boris Johnson’s government which is contrary to the Brexit Agreement.

Starting 1 January 2023, Matthias Haentjens has been appointed as Professor of Civil Law at Leiden University. His expertise lies in the field of property law, insolvency law, and private international law.

On Tuesday 30 September 2025, PhD candidate Jonathan Collins will defend his dissertation A Wolf in Sheep’s Clothing: A Mixed-Methods Analysis of the Far-Right Alt-Tech Social Media Movement in Leiden’s Academy Building. His work examines the communication dynamics of far-right communities on alternative…

According to a study conducted by multiple research institutes, governments and law enforcements should widen the scope of their focus to right-winged terrorists such as Andres Breivik. The Guardian issued an in-depth analysis of their work last week.

It appears that interest groups are increasingly finding their way to court or other ways of making use of the legal system as a means for societal change. Over the summer, Rowie Stolk, PhD candidate at the Department of Constitutional and Administrative Law was one of the speakers at the workshop ‘Legal…

What issues arise in the changing landscape of privacy, identity and data protection?

On 19 September 2019, Lynette Janssen defended her thesis 'EU Bank Resolution Framework: A comparative study on the relation with national private law'. The doctoral research was supervised by Prof.mr. W.A.K. Rank and prof. M. Haentjens.

Sweetie 2.0 is a research project commissioned by Terre des Hommes on online child sex tourism and criminal law.

The Department of Civil Law teaches and conducts research in the field of civil law. It is responsible for the master’s degree programme Civiel Recht (Civil Law LL.M.) which attracts many students each year from Leiden and elsewhere.

This paper examines the need and possibility for developing online resilience-based approaches in response to COVID-19 vaccine conspiracies, often linked to the far right.

Doing a PhD on the side? External PhD candidates, like Joost Van der Helm, just get on and ‘do it’. Besides his hectic job as a justice at the Court of Appeal in The Hague, Van der Helm managed to still find time to write a PhD dissertation.

Waarom is empirisch-juridisch onderzoek van belang voor de rechtspraktijk en het wetenschappelijke onderzoek? Op die vraag kregen masterstudenten van de afstudeerrichtingen civiel recht, ondernemingsrecht en financieel recht antwoord tijdens het congres over empirisch-juridisch onderzoek en het privaatrecht…

A delegation from Leiden University visited Japan from 18 to 26 November to facilitate cooperation in research and teaching. The delegation also attended the signing of a twinning agreement between the cities of Leiden and Nagasaki and the opening of a bridge to Dejima, once literally the bridge between…

Waar vindt u ons?

The Hazelhoff Centre for Financial Law team regularly publishes in both Dutch and international academic journals and book series.

On Wednesday 22 June 2016 Wouter den Hollander will defend his PhD Thesis De relativiteit van wettelijke normen ('The Relativity of Statutory Provisions'). The public defence starts at 16.15 hours in the Academy Building.

How much mortgage interest can I claim back according to law? Or maintenance payments, how much do the tax authorities let me deduct? Many citizens struggle with questions about the application of tax legislation. Roberto van den Heuvel investigated in what way tax legislation should provide clarity…

Tim Koopmans is one of the great minds in the history of Dutch and European legal scholarship. He taught law as a professor in Leiden and other universities, among which Ghent, Cambridge, Utrecht. He practiced it as a judge in the European Court of Justice and Advocate-General in the Dutch Supreme Court,…

Whether implicitly or explicitly, we all have ideas about how the law is supposed to function, whose interests it should represent, and what role it should play in society. This project explores the ways in which these questions are addressed in the works of the Roman historian Publius Cornelius Tacitus…

What makes people in the Netherlands join radical and far-right groups? PhD candidate Nikki Sterkenburg followed several activists. ‘Some feel it is their duty to defend the Dutch nation.’ PhD defence on 19 May.

This project aims to answer legally relevant questions in the field of consumer law by means of empirical research.

ELS@Leiden research encompasses a wide range of empirical-legal projects carried out within Leiden Law School from the perspective of multiple disciplines and methods. Here you can find the publications of our (former) lab members since the start of the Sector Plan.

The EEA enforcement system includes, in particular, the mechanism pursuant to Article 111 EEA for the settlement of disputes between the Member States with respect to the interpretation and the application of EEA law.

Civil Law is a specialisation of the master’s programme Rechtsgeleerdheid (Law) at the renowned Leiden Law School of Leiden University.

Tackling radicalisation among young people is a complex issue in which government authorities may choose to apply legal measures. PhD student Nina van Capelleveen examined the risks such legal instruments can pose to the fundamental rights of minors.

The Dutch-Japanese made DESHIMA instrument has passed its first practical tests when measuring the distances and ages of distant galaxies. The core of the instrument is a chip the size of two euro coins that measures 49 shades of far infrared light. The developers of the spectrometer publish the results…

Reports from Quebec media show the French-Canadian far-right organisation La Meute dealt itself another self-inflicted blow this week, with several club executives being forced out of the group and having a former co-founder, Patrick Beaudry, publicly declare ‘the ship is sinking.’

The center studies the many ways in which issues of law and justice are dealt with in art and literature with a focus on liminal issues and cases. These are issues and cases where law comes to the limits of what it is capable of dealing with and art and literature explore the implications of what is…

European product safety law is one of the focal points of internal market legislation.

Valedictory lecture

A civil servant employed by the municipality of The Hague was cause for discussion after taking part in an Extinction Rebellion protest. Only under additional conditions could the employee in question stay on at the municipality. She decided to resign. According to Barend Barentsen, Professor of Labour…

Financial Law is a specialisation of the master’s programme Rechtsgeleerdheid (Law) at the renowned Leiden Law School of Leiden University.

Law & Business Administration is a specialisation of the master’s programme Rechtsgeleerdheid (Law) at the renowned Leiden Law School of Leiden University.

Atrocities have been the order of the day in Syria since war broke out in 2011, but the perpetrators are rarely tried. According to PhD candidate Elizabeth Van Schaack, the international community could bring justice in Syria, but only if there is political will. PhD defence on 29 April 2020.

In Indonesië zijn studenten massaal in opstand gekomen tegen de regering, die vlak voordat er straks een nieuw parlement aantreedt, nog snel een aantal nieuwe wetten wil doorvoeren.

Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh

‘Countering violent extremism – the international deradicalization agenda’ is the name of the book Tahir Abbas published last month. In this interview the associate professor in Terrorism and Political Violence at ISGA tells about the backgrounds and goals of the book.

In an interview with Jaap van den Herik, Professor emeritus Law and IT, legal magazine Mr. writes that The Hague municipality wants to attract more legal tech start-ups. The municipality has therefore commissioned the Leiden Centre of Data Science (LCDS) of Leiden University to conduct a study into…

Below are some of the scholarly works published within the context of the Institutions for Conflict Resolution programme.

Labour law is constantly changing. Concurrently, the laws dealing with workers address fundamental issues which are invariably of major significance and value. The research carried out at the Department of Labour Law and Social Security focusses on both the (constant) changes in labour law and social…

The Department of Business Studies provides business scientific education for students of the Faculty of Law, as well as for students from other faculties of Leiden University.

The Department of Company Law and Financial Law provides education and conducts research in areas including the law of legal entities and corporations, financial contract- and liability law, corporate governance, sustainability, Dutch and EU financial regulatory law, mergers and acquisitions, insolvency…

The Department of Civil Law is responsible for education and research in the field of civil law. We teach the master’s degree programme Civiel Recht (Civil Law LL.M.), attracting many students each year from Leiden and elsewhere.

Below you will find a collection of books, other than those in the BLRN book series, to which members of BLRN have contributed.

Just published: United in incoherence – Private law concepts under pressure from European financial law (in Dutch), in: Tijdschift voor privaatrecht 2017-4

Hart Publishing in Oxford has published the first book in a series entitled ‘Restatement of Labour Law in Europe’. This particular book deals with the question of which employees are protected by labour law (‘The concept of employee’).

The Children’s Rights Monitor provides a thematic overview of the implementation of the UN Convention on the Rights of the Child in the Netherlands.

The Private International Law department offers several courses in the bachelor-, master- and advanced master programs.

On 19 February 2019, Mirjam Sombroek-van Doorm defended her thesis 'Medisch beroepsgeheim en de zorgplicht van de arts bij kindermishandeling in de rechtsverhouding tussen arts, kind en ouders'. The doctoral research was supervised by Prof. dr. A.G. Castermans en Prof. mr. C.J.J.M. Stolker.