To make digital communication more secure, we need to tighten up the legal frameworks and identify the biggest cyber threats.

We depend on nature for so many things: from clean water, wood and food to carbon absorption, water purification and coastal protection, as well as for relaxation, inspiration and identity. Nevertheless, our modern world putting increasing pressure on these ecosystem services. Leiden researchers investigate…

PhD candidates are encouraged to start thinking about job prospects well before the defence of their thesis. Many PhD graduates find employment in an academic or semi-academic environment.

The project interrogates the relationship between impartiality and power and asks whether impartiality as a cornerstone of global governance can – and ought to – be re-envisioned in the context of changing global governance power relations.

The project investigates the changing local context of crime dynamics and the responses by selected international organizations and national governments. It places a major emphasis on security management at the trans-national level by investigating intra-regional security cooperation between Latin America,…

Team History of Africa and the Americas

How safe do you feel when you’re walking around the streets of Leiden? Do you generally feel safe? Are there any situations when you feel unsafe in the city? These are the kinds of questions that Leiden’s City Criminologist Marianne Franken – from Leiden University – hopes to be able to answer. In collaboration…

The premier LUCIS lecture series, running since 2021. Each year, two eminent scholars visit Leiden to deliver landmark lectures in Islamic and Middle East Studies. This forum for presenting and discussing cutting-edge research brings together researchers, students, and other interested participants…

On 26 juni 2018, Claire Achmad defended her doctoral thesis 'Children’s Rights in International Commercial Surrogacy: Exploring the Challenges from a Child Rights, Public International Law Perspective'. The doctoral research was supervised by Prof. Dr. Mariëlle Bruning.

This dissertation addresses the position of artistic research within academia.

A warm welcome to the Graduate School of FGGA at Leiden University.

On 25 October 2018, Tu Zhang defended her thesis 'Public Reason Secularism: A Defense of Liberal Democracy'. The doctoral research was supervised by prof. P. Cliteur.

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.

The main theme of this thesis is the theoretical study of Gaussian processes as a tool in Bayesian nonparametric statistics.

To make successful communication possible, people need much more than their knowledge of the language system.

News, events, announcements, social media and more about the building of the new Middle Eastern Library in Leiden

Many Asian countries are in a process of democratisation. The expectation was that citizens would gradually gain more control over the functioning of their elites. Experts from Leiden have concluded that this process often fails to improve the quality of the administration. They researched the nature…

Energy transition will entail the construction of large numbers of new energy installations. Such construction projects may meet with opposition from people living close by. Assistant Professor Bríd Walsh investigated how the local community can best take part in such projects.

The transition from fossil fuels and the practical changes that this entails make many demands on citizens. Emma ter Mors, a psychologist and lecturer at Leiden University, is researching the factors that contribute to public perception and acceptance of new energy technologies.

PhD candidate Fien Demuynck researched how wind farms affect fish and how to minimise any negative impact.

When psychologists repeated a hundred studies in 2015, their results differed in two-thirds of the studies. ‘Research into research is not a luxury but a necessity,’ says Professor of Methodology and Statistics of Psychological Research Mark de Rooij. ‘My aim is to improve psychological research, to think…

IT lawyer Eduard Fosch Villaronga wants to promote diversity and inclusiveness in AI research. And that's really important, because he has observed how artificial intelligence - from Twitter to walking robots - is prejudice in terms of race, gender and sexual orientation.

Let’s get this out of the way: Hillary Clinton won the 26 September 2016 presidential candidates television debate. Handily.

Organisations such as the EU are of enormous benefit to the member states, but the inhabitants of the member states are often unaware of this. Leiden researchers investigate whether international organisations such as the EU or ASEAN are able to influence global politics.

Joost Batenburg is a mathematician and computer scientist who works to build bridges to other disciplines. He hopes to bring intelligent software to fields where it can make a difference. Conversely, he also seeks connections to the disciplines that are needed to make AI a success.

Being a better neighbour to the nature around you

Through this research, we aim to gain a clear understanding of perceptions of safety in Leiden. The results will provide us with information about current perceptions. As Leiden’s City Criminologist Marianne Franken explains: ‘This research really focuses on Leiden’s residents. That’s why want to ask…

In the future, physicians may be able to identify dementia much earlier than they can today because a computer algorithm will be able to predict from brain scans how our memory is going to develop.

A cautious response to a crisis or terrorist act avoids the creation of a culture of fear. This is another way to reduce our vulnerability to terrorism.

Researchers have the whole world as their work area. Dutch researchers collaborate with Chinese, Australians give lectures in Lithuania, Koreans move to America and back. Who can contribute to academic knowledge, who benefits from it and who pays for it? A fair and effective system for this has not…

Human activity, such as pollution, may disturb the balance of living water systems, which has consequences for biodiversity, but also for other functions such as water purification. Leiden University maps living water systems using the most advanced technologies.

To ensure that the growing global flows of labour migrants are guided correctly, we need knowledge. Why do people leave home, why do they go to specific countries, and how can that choice be influenced? And what are the consequences of their leaving for the people who stay?

In the face of threats from other groups, humans, chimpanzees, and a selection of other species get closer with their own. This research shows that even bonobos show a moderated version of this effect. This suggests that this behavior may emerged prior to the Pan-Homo split, several millions years ago.…

One often sees gloomy Dutch newspaper headlines about pupils’ arithmetic skills in elementary schools. But is the situation really so bad? Marian Hickendorff is conducting intricate research on performance in and the teaching of arithmetic. The conclusions she draws beg to differ.

With your degree in Philosophy: Global and Comparative Perspectives, you’re more than a specialist in world philosophy. Alongside your subject expertise, you’ve developed a broad set of academic skills that give you a strong start to your career. Graduates often find roles where advising, archiving…

The specialisation Global Conflict in the Modern Era of the master’s in International Relations at Leiden University engages you with the scholarly debates about global conflict today and in the recent past.

The Van Vollenhoven Institute for Law, Governance and Society (VVI) is part of the Leiden Law School.

The Institute of Security and Global Affairs (ISGA) is a scientific institute that specialises in security issues.

In the first part, we introduce a new condition, called toric-additivity, on a family of abelian varieties degenerating to a semi-abelian scheme over a normal crossing divisor.

How many stars are there in the Universe? And how can astronauts float in space? These and many other questions about astronomy will be answered at Leiden University on Saturday 9 February.

Subproject of

LENS is engaged in the drawing up a cartography of the mediascape, past and present, researching the dispositifs and ecologies of image production and presentation, which stretch across diverse geo-political areas as well as institutional, discursive and technological fields.

Irene Morfini defended her thesis on 21 February 2019

Knowledge and culture subproject 1:

By choosing Leiden University, you’ll be choosing to broaden your personal and academic horizons. You’ll be in excellent company too, because you’ll be part of an inspiring community of students, lecturers and professors from all over the world. Founded in 1575, ours is the oldest university in the…