The central aim is to systematically study differences in crime patterns and social control between migrants and non-migrants in early modern Frankfurt am Main.

Due to its economic prosperity, its policy of (relative) religious tolerance, and its large numbers of migrants, the Dutch Republic has long had a reputation of being the prime example of ‘tolerance’, especially during the seventeenth century. Although the great variety of newcomers in the Dutch Republic…

Although plant domestication has significantly altered crop genetics and phenotypes, its effects on the taxonomic and functional diversity of plant-associated microbiomes are not well understood.

Video games have emerged as one of the most interesting media of the turn of the century. The peculiar characteristic of video games is the biunivocal interaction between the computer and the human player.

This study is a critical discourse analysis of the misogynistic narratives shared by three incel violent extremists.

On Wednesday, 14 May 2025, Catherine O'Regan will deliver the annual Van Vollenhoven Lecture

Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.

The aim of this thesis was to examine what teachers want to learn themselves. The main research question was: what, how and why teachers want to learn? And does this depend on their years of teaching experience and the school at which they work?

The Darién region of Panama is the only land bridge connecting North, Central and South America. Nowadays home to descendants of African enslaved peoples, Indigenous peoples (Emberá, Wounaan, and Guna), and mestizos, Darién has been and still is fundamental to connectivity, cultural interchange, and…

Eduard Fosch-Villaronga, Associate Professor at eLaw, contributed to 'Cyber–Physical–Human Systems', a book exploring the latest developments in interactions between cyber–physical systems and humans.

To what extent are there differences between countries in and outside the European Union and the Schengen area in the level of crimmigration, the merger between migration control and crime control, and to what extent can these differences be explained by the way in which state and non-state actors in…

On 20 februari 2019, Chris van Oostrum defended his thesis 'Regres bij concernfinanciering'. The doctoral research was supervised by Prof. mr. S.M. Bartman.

The ‘Leer te Durven!’ program (Learn to Dare) is a preventive training program for children with mild anxiety symptoms (Simon & Bögels, 2014). The program has been developed for children between the ages of 8 and 12 who feel or behave anxiously, avoid situations, are afraid of doing things wrong, appear…

Do you have to be able to say everything on Twitter and Facebook? Is Instagram morally obliged to remove photos from attacks? Should we allow the terrorist group to recruit new members on the internet?

The more we learn about a (neuro-)psychological or physical disorder and the related behavioral factors, the better we can not only identify them, but also treat them. It is therefore important that recent insights about (neuro-)psychological problems and related behavioral factors are incorporated…

In the last decades, activity-based protein profiling (ABPP) has emerged as a powerful chemical tool that may aid the ever-challenging drug discovery process.

On the 22nd of February, Ami Okabe successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Ami on this achievement!

Moritz Jesse, Associate Professor of EU Law at the Europa Institute, has published his book, “The Civic Citizens of Europe: The Legal Potential for Immigrant Integration in the EU, Belgium, Germany, and the United Kingdom”.

This project analyzes to what extent hodegetical textbooks relied on each other in warning their readers against vicious habits, how much continuity their catalogs of vice displayed, and to what extent vices that persisted throughout the 18th and 19th centuries were associated with easy-to-remember…

Get to know us through our online and in-person events for prospective students!

Does a moving hybrid zone leave a genomic footprint?

On the 21st of September, Carlos Benítez-Torres successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Carlos on this achievement!

Shining a new light on the Roman world

What should you do in an emergency?

The Executive Board is responsible for the management and administration of the entire University.

Security and Legitimacy is one of the three organisational clusters of the Institute of Political Science.

Although migration and integration have become important concepts today as a result of globalization, migration movements, integration, and multiculturalism have always been part of the history of Europe. Few people realize how many ethnic groups participated in migration within Europe or into Europe…

This film will be screened on Sunday, 15 February 2026 at 7:00 pm.

The deans (chairs of the faculty boards) form the Board of Deans, which is chaired by the Rector Magnificus.

We perform multidisciplinary research at molecular, cellular, and organismal levels of animal biology to increase fundamental understanding of health and disease.

The Summer School on International Humanitarian Law is designed by the Grotius Centre Kalshoven-Gieskes Forum on International Humanitarian Law. Registration is now open!

Local authorities face numerous major issues in different neighbourhoods, all requiring different approaches and solutions. With this study, Leiden University aims to gain a better understanding of how residents from every neighbourhood in The Hague think and act on such issues. This insight will help…

When you apply for admission, you’ll be asked to submit several documents. The documents that are required depend on your educational background and chosen study programme.

When you apply for admission, you’ll be asked to submit several documents. The documents that are required depend on your educational background and chosen study programme.

Assistance for refugee students, first-generation students, and students from Suriname and the Caribbean region of The Netherlands.

If idioms employed in codes of conduct could be as idiosyncratic as examples suggest, then to what extent did early modern language of vice, too, persist in this genre?

A seven-metre glass tunnel, filled with running water, and equipped with speakers and cameras. An artificial river for investigating what light and sound pollution do to migrating fish.

On 16 December 2019, Jan-Harm de Villiers defended his thesis 'The Anthropomorphic Hegemony of Subjectivity: Critical Reflections on Law and the Question of the Animal'. The doctoral research was supervised by Prof. P. Cliteur.

This project analyses the democratic consequences of increasing decentralization and regionalization in European countries. Through an original approach that foregrounds informal political dynamics, it studies the functioning of democracy in subnational units, and investigates the effects of ever more…

What are best practices for teaching students to engage with 'wicked' problems?

Beneficial plant-associated microbiota, particularly those inhabiting the rhizosphere, contribute substantially to plant health through pathogen suppression, stimulation of plant defence responses, and enhanced nutrient acquisition.

How was the racial landscape of citizenship and democracy in antebellum America characterized, and how did free Black populations in various states navigate such landscapes?

Find out what it is like to study at the Faculty of Law. Watch the video below to get an impression of our facilities and our faculty in Leiden and The Hague. Be sure to also take part in our online and on-campus information sessions!

The Europa Institute of Leiden University is one of the oldest academic institutes specialised in the law of the European Union and the European Convention on Human Rights; it was established in 1957, the same year as the European Economic Community itself.

In the thesis the dynamics of strategies is studied from two perspectives.In the first part of the thesis strategies are considered to be opinions present in a community.

A source of inspiration for readers who are curious to understand how people move and convince each other