The concept behind GraspOS is to build the European Federated Open Metrics Infrastructure in a decentralised way, where: different types of data come together to create metrics; tools and services are developed to improve EU or global infrastructures but are also shared with national or institutional…

This critical edition covers the first two parts of De secundis intentionibus by Hervaeus Natalis (14th century).

The ability to collect and interpret huge quantities of data has become indispensable to society and academia. Leiden University is a knowledge and expertise centre for data science that places the emphasis on interdisciplinary collaboration and innovation.

From where litter ends up to which languages are spoken in Leiden and The Hague: over 50 interesting, surprising, complex and entertaining questions were sent in for the Citizen Science project to mark our 444th anniversary. Not one but two Citizen Science projects will be starting this year in Leiden…

On this page you find all the ways through which the Institute of Psychology aims to foster Open Science.

Citizen science has recently become a widely used term, but what does it mean exactly? How does citizen science compare to crowdsourcing? And where does community archaeology stand in this discussion?

People who are arrested on suspicion of preparing an attack are at risk of becoming radicalised either during or after their detention. Whether or not to arrest someone requires careful consideration. At the end of the prison sentence, it is important to provide effective supervision of the reintegration…

The majority of scientists, from archaeologists through to zoologists, collect enormous volumes of data. Their massive databases contain large amounts of information which is difficult for humans to filter. With a solid grounding in statistics and computer science, we can develop algorithms for analyzing…

The Institute of Political Science is a vibrant department with nearly 70 academic staff in Leiden and nearby The Hague.

Are you thinking about studying Biomedical Sciences? Learn more and watch a short promo video.

The gripping story of a collective passion for freedom that shook the world.

'Reworking Culture is based on the author’s ethnographic engagement with people in and around the village of Sadolpara in the West Garo Hills in highland Northeast India (HNEI), where he conducted more than 20 years of fieldwork.'

The new Master’s programme in Public Sector Economics (MSc Economics) prepares you to become the policy economist of the future. The programme enables you to bridge the gap between economic theories, scientific methods, the functioning of Dutch institutions and policy processes, as well as current societal…

Publication on the excavations at Roman fort Matilo in Leiden

The threat of totalitarian domination; the rise of bureaucratic expertise; the resurgence of nationalisms and xenophobia; the claims of religion in secular societies; and the importance of robust legal and political institutions: these are among the main issues that mark—or specters that haunt—the 20th…

On 18 November 2020, Mojan Samadi defended her thesis 'Normering en toezicht in de opsporing'. The doctoral research was supervised by Prof. J.H. Crijns.

Martijn Junte defended his thesis on 21 September 2017

Leidse milieuwetenschappers doen onderzoek naar microplastics, bestrijdingsmiddelen en bemesting. En binnenkort naar lichtvervuiling en nieuwe materialen uit de nanotechnologie.

On 25 November 2020, Sara Arendse defended her thesis 'De uiterlijke verschijningsvorm in het strafrecht'. The doctoral research was supervised by prof. C.P.M. Cleiren and prof. J.M. ten Voorde.

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

The Department of Archaeological Sciences seeks to achieve the highest standards of excellence in science-driven education and archaeological research across the globe and across all periods.

Onderzoek van de onderzoeksgroep 'War, Peace and Justice'

Computational thinking, programming, and algorithms form the basic of many of the things that are shaping our world, the way we work, interact, organize ourselves, and even spend our free time with social networks, streaming media, and games. And this transformation is far from being complete, it is…

Are you thinking about studying Political Science? Watch the introduction video’s and learn more!

The majority of scientists, from archaeologists through to zoologists, collect huge volumes of data. Their massive databases contain large amounts of information which is difficult for humans to filter. With a solid grounding in statistics, we can develop algorithms for analysing and identifying patterns…

BE-OPEN is a structural project funded under the Erasmus+ Capacity Building in Higher Education action. The project is coordinated by the University of Novi Sad, Serbia. The main objective of the project is to develop conditions for the implementation of the core principles of Open Science at universities…

Are you thinking about studying Computer Science? Learn more and watch the videos. Note: As of September 2025 you can also combine this master programme with the Business Studies specialisation.

A new bill is currently under debate in the Netherlands, advocating raising the prison sentence for manslaughter from 15 to 25 years. ‘This very serious crime (...) evokes feelings of disgust and insecurity in society’, Dutch Minister for Justice and Security Grapperhaus comments on the sentence that…

The Iseum Campense, the impressive sanctuary for Isis and the Egyptian gods on the Campus Martius and arguably one of ancient Rome’s most notable absent presences, is a monument central to various debates.

This book concerns cultural production in contemporary Latin American cities: chaotic cities where the ideal of order has become fragmented and the walls of the lettered city have become porous. New and multifarious urban trajectories—intersecting, colliding, superimposing—trace the image of the postmodern…

This book reveals how one publishing firm's editorial strategy helped to legitimate European colonialism in the early modern era.

Amsterdam painter Dirk Valkenburg (1675–1721) produced some of the earliest depictions of Indigenous and enslaved people on Surinamese sugar plantations – idealized images that conceal the violence of colonialism.

In Microbial Sciences, we perform multidisciplinary research to understand the structure and function of microbes at all levels of biological organization, from small molecules and cellular structures at atomic resolution to multicellular communities.

Leiden University will be recording a brand-new series of podcasts in 2019: Science Shots. Our top scientists will talk about their research in less than 15 minutes. Tip: something to enjoy on the train journey between Leiden and The Hague, our two University cities!

The mission of the Plant Sciences cluster is to contribute to the sustainable production of high-quality crops, flowers and high-value bio-based products, and to contribute to the maintenance and restoration of biodiversity in natural ecosystems. This is realised by generating fundamental knowledge…

How to minimalize the chance of recidivism for extremist prisoners.

Cette étude montre que le développement phonético-phonologique en fulfulde et bambara est à la foiscomparable au développement langagier dans d’autres langues du monde et influencé par les caractéristiques phonétiques et phonologiques de ces deux langues notamment au niveau de la phonotaxe.

PhD candidates carry out a programme of independent research and additional (limited) course work, culminating in production of a PhD thesis in typically 4 years.

Foute taal? Bestaat niet!

The master’s specialisation Bio-Pharmaceutical Sciences and Science Communication & Society at Leiden University is a two-year programme which combines research training in chemistry with one in techniques of communication.

Bart de Smit has been appointed to the position of Vice Dean of the Faculty of Science for four years, as of 1 January 2019. After Han de Winde stepped down as Vice Dean in September, De Smit already took over his duties ad interim.

With the emergence of new methods and technologies such as improved DNA analysis and big data, archaeological research has changed radically in recent decades. The researchers from the Department of Archaeological Sciences at the Faculty of Archaeology use new scientific knowledge to answer fundamental…

At the Institute of Political Science we value our alumni. We can learn from you, and would like to contribute to your further development. And, of course, we want to lend a hand in connecting ‘our’ political scientists all over the world.

PhD candidates carry out a programme of independent research and additional (limited) course work, culminating in production of a PhD thesis in typically 4 years.

PhD candidates carry out a programme of independent research, leading to a PhD thesis in typically 4 years.

Covid-19 is een disruptieve ontwikkeling die hier en nu veel vraagt van zorgprofessionals, bestuurders en managers. Hoewel de crisis nog volop bezig is, is nu al duidelijk dat het Coronavirus een blijvende impact zal hebben op zorginstellingen en fundamentele vragen oproept over hoe we onze zorg optimaal…

Gorlaeus Gebouw, Einsteinweg 55, 2333 CC, Leiden

Only the fittest cyclists stand a chance of taking yellow in the brutal Tour de France. Team Jumbo-Visma is working with data scientists from Leiden. They have analysed the stages and performance of Jumbo-Visma’s riders in previous Grand Tours. And they are researching how to determine the fitness level…