If an algorithm has to learn to understand language, simply having a lot of data doesn’t help much. Like us, a computer has to learn the language in interaction with others. Tessa Verhoef is fascinated by how this interaction works.

Multinationals use loopholes in the tax treaties between different states. A possible solution would be to eliminate all these loopholes in one go by creating a central global treaty. Leiden researchers are investigating whether this kind of mega-treaty is feasible.

On this page you will find more information about the selected projects of the Justice, Equity, Diversity and Inclusion (JEDI) Fund for 2026.

Leiden Institute of Advanced Computer Science (LIACS)

This research cluster is a part of the Institute of Political Science’s research programme ‘Institutions, Decisions and Collective Behaviour’. Its members focus on the democratic role of citizens and the representative links between voters and politicians.

The War and Peace Studies track offers you a comprehensive understanding of the historical, theoretical, and practical dimensions of war and peace, while addressing the complex challenges of conflict and peacebuilding in the contemporary world.

Below, you can find the answers to frequently asked questions about the Summer School.

How do digital technologies affect adolescent mental health and resilience? How do we foster a secure online environment? How should we deal with increasing rates of online crimes among adolescents? During the mini-symposium ‘The effect of the online world on adolescents’, presented by the interdisciplinary…

In the late colonial Netherlands Indies, starting from 1892, homes were set up for the re-education of children. At first by private individuals, later by the government. Much later still, privately funded institutions existed alongside government-funded ones. Annelieke Dirks’ defence on 23 June 201…

Whilst the world is opening up, the teaching will continue in a hybrid form next academic year. During the past year, when all of us were bound to our home offices and computer screens, new forms of education had to be developed – some of which proved to be efficient in preparing the students for their…

Artificial Intelligence is likely to have far-reaching consequences for all actors in the realm of academic publishing, including authors, editors, researchers, and readers. This symposium aims to foster the conversation about the various ways in which we evaluate, enrich, and disseminate academic knowledge,…

Hybrid Symposium: Medieval miniatures from Byvanck to the RKD. 18 March 2025, Den Haag.

Language courses from February onwards

How do insurance products transform intimate and personal relations? What are the consequences of the classifications that insurance companies use and how do these affect solidarity, morality and inequality?

Meet our team

The American Association for the Advancement of Science Annual Meeting is one of the largest and most influential interdisciplinary scientific conferences in the world. Held annually, it serves as a global forum for presenting new research, discussing pressing societal challenges, and fostering collaboration…

Hackathon

PhD defence

PhD defence

Although he works for the Deloitte international management consulting firm, Robin Bergman identifies himself as an "artist, designer and researcher". He is fascinated by technology and nature, and the tensions that exist between them.

How do you offer proper education in times of corona? Annebeth Simonsz (Educational Advice and Quality Assurance) and Anna Benjamins (ECOLe) work closely together to support lecturers in hybrid and online education. They are happy to share with the faculty, lecturers’ creative solutions for the new…

Knowledge and culture subproject 4:

To truly understand complex regions such as the Middle East and Asia, you have to know their culture, history and local societies inside out. Driven by curiosity for other cultures, the Leiden University Institute for Area Studies (LIAS) provides an understanding and analysis of current and historical…

Democratic citizenship refers to the capacity and willingness of citizens to actively influence the functioning of state institutions. While considered a vital correlate of democratization and the rule of law, its largely western-oriented literature rarely studies the forms of democratic citizenship…

What is the effect of light at night on plant phenology and physiology, and how does this affect plant interactions with other species?

The research conducted at the Leiden Academic Centre for Drug Research is clustered within the divisions of BioTherapeutics, Cell Systems and Drug Safety, Medicinal Chemistry and Systems Pharmacology and Pharmacy, and the Metabolomics and Analytics Centre.

The LACDR represents the core of bio-pharmaceutical research at Leiden University, and we interact closely with our partners:

We know this, but we don’t act on it: eat healthily, move more, address our stress levels and sleep well. Internist and Professor of Diabetology Hanno Pijl is fascinated by the effect that a healthy lifestyle can have on health. He researches how this lifestyle is achievable and satisfying, for patients…

The Physics and Quantum Matter and Optics specialisation is one of the two programmes Leiden offers in experimental physics. The programme can be tailored to individual needs and interests.

By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.

The Research MA Classics and Ancient Civilizations covers two years and can be studied in four tracks: Classics is one of them. While diving into the literary, cultural and intellectual worlds of Greece and Rome, you will be involved in current research, and stimulated to reflect on the significance…

This master’s programme combines Physics with Data Science. You will learn how physics has its own tricks to deal with big data and how techniques from machine learning and deep learning can be applied to classical and quantum data. The first focus of attention is on classical data, including data mining,…

Open up a world of opportunities with your master's degree in Archaeology from Leiden University!

We are committed to provide you a meaningful, rigorous and quality graduate experiences in a personalized environment with a cutting edge research infrastructure and internationally renowned supervisors.

Graduates of the master's specialisation in Global Ethnography are proficient in analysing and reporting global vulnerabilities and local forms of resilience.

The Biological- and Soft-Matter Physics Master specialisation is one of the two programmes Leiden offers in experimental Physics. The programme can to a high degree be tailored to individual needs and interests.

How do you ensure that research is performed, evaluated and managed in a responsible way? This question is also of the utmost important to the University itself. The Centre for Science and Technology Studies (CWTS) studies scientific research and its relationship with technology, innovation and soci…

At Leiden University, researchers from all disciplines work together to find answers and design innovations in the field of artificial intelligence.

Regenerative medicine is a new way of treatment that helps impaired cells, tissues, and organs work well again. We do this by repairing, replacing, or restoring cells, tissues, and organs after damage from illness or injury. This includes treating long-term diseases such as diabetes, kidney diseases,…

The Faculty of Science

In this publication the results of the analyses of the Roman harbour of Voorburg-Arentsburg (NL) are presented. This fully inclusive and integrated study of more than 1000 pages is published in two volumes. The publication is written in Dutch, but has got an extensive synthesis/summary in English.

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.

Bij de Universiteit Leiden zet onze Onderzoeksgroep violence and violence prevention zich in voor het bevorderen van kennis en begrip op het gebied van geweld en geweldpreventie door middel van interdisciplinaire wetenschappen en innovatieve methodologieën. Onze faculteitsleden zijn toonaangevende…

In STAYAHEAD data-intensive approaches are being developed to ”decode the human immunome” with a focus on a global vaccine strategy. They have developed a rapid mass spectrometric test to analyse in real-time large numbers of variants of SARS-CoV-2 and the host immune response, and use these data to…

The role of transnational, non-institutional networks in the opening up of British transatlantic trade at the end of the 17th/beginning of the 18th century

Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…

Grassroots heritage initiatives and community engagement