With many kilometres of beaches, hundreds of sights, excellent restaurants and lively cafés, the Hague really is a cool city to live in. However, arranging accommodation can demand a lot of time and effort for Dutch and international students. For this reason, finding a place to stay is one of the first…

Optimally solving real-world expensive Black-Box Optimization (BBO) problems w.r.t. real-world constraints, such as wall-clock time and computational costs, is extremely difficult and tedious.

In 'That's Why Teacher', our educators share their experiences. Asking challenging questions to seek a deeper understanding is how Stella Trompet perceives the growth of her students. She serves as a lecturer in the half-minor and master's programme Health, Ageing, and Society at LUMC/Leiden Univers…

Below you can read about studies we have carried out in the past.

Science for Sustainable Societies offers an exciting combination of theory and practice. While analysing and examining relevant topics from both the natural and the social sciences domains, you will also gain lots of hands-on experience. Interactive learning and working together in a team are important…

Make sure you have a suitable place to work or study.

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…

Leiden experts research ways in which European legislation is converted into national legislation. Knowing how this process works can inspire policy-makers trying to achieve their aims while abiding to Europan legislation.

LUMC researchers are looking for factors that point to illness at an early stage.

PhD candidates have access to various forms of material support.

The LL.M. (Governance of Migration and Diversity specialization) provides in-depth expertise on migration, asylum, diversity, and non-discrimination law with an international and European focus. Courses span multiple academic disciplines, including law, history, sociology, political science, and development…

This project, executed by Marieke Hendriksen MA MRes, aims at an analysis of how the early modern anatomical collections of Leiden University were rooted in ideals of perfection in different fields of knowledge and expertise.

Fundamental research teaches us how our brain decides to eat one more sweet, instead of doing exercise. A public information campaign about healthy lifestyle has little impact on the decision, as Professor of General Psychology Bernard Hommel is aware. However, he does know what works. But the question…

A Paleoecological Study of Sittard, Stein, Elsloo and Hienheim

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.

Research lines within the Pharmacy group:

Being a better neighbour to the nature around you

Research report January 2020. Supported by the lectorate ‘Music, Education and Society’, research group ‘Making in Music’, Royal Conservatoire The Hague

How can reciprocal learning of mentor and mentee about PCK (Pedagogical Content Knowledge) during the secondary school internship be established?

The programs of Cultural Anthropology and Development Sociology, Educational Sciences, and Psychology offer the opportunity to take individual courses from the complete range of education. This 'contract teaching’ is intended for those interested in delving into a specific subject but do not wish to…

Leiden University archaeologists are reconstructing houses from the Stone Age, using only resources available during that period. This method offers surprising insights into the ingenuity of our distant ancestors, and challenges existing archaeological views.

LUMC researchers are looking for factors that point to illness at an early stage.

Brenda M.S. da Silva and colleagues designed and validated the “Moral Emotions Questionnaire” (MEQ) for identifying three major moral emotions in preschoolers – allowing to separately measure guilt, shame and pride at the youngest ages.

This year Leiden University exists for 444 years! This will be celebrated together with the residents of Leiden and The Hague during various activities. One of these is scientists and residents doing research on plastics and psychology together.

The purpose of the facility is to provide computational biology support to students and researchers at the Institute of Biology. We maintain several servers that support bioinformatics research and education within IBL and its collaborators. These servers are not intended to replace the ALICE HPC…

The plans for making the University Library (UB) more sustainable will be carried out in three steps: first the glazing at the front of the building will be replaced with HR++ glass, then the skylights will be renewed and finally the air conditioning system will be updated. Once these steps have been…

The Honours Academy works closely with partner organisations where students carry out practical assignments. In addition, the Honours Academy collaborates with schools to realise Pre-University education.

Note: MSc International Organisation application deadlines at Leiden University are 1 April for students requiring a visa, and 15 May for others.

Check your application deadlines here. Take note: Not all programmes have the same deadlines; always check the individual programme descriptions for application deadlines.

Information on contract teaching at the Faculty of Science.

What are key regulators of plant ageing that can reverse ageing in plants (rejuvenation), and how can we use this knowledge to improve crop plants?

Check the application deadlines for the MSc Democracy and Representation at Leiden University: important dates for applicants from the EU/EEA and non-EU regions, including housing application timelines.

Note the application deadlines for MSc International Politics at Leiden University: 1 April for visa-required applicants and 15 May for EU/EER applicants, with separate housing deadlines.

Check the application deadlines for the MSc Political Theory: Legitimacy and Justice at Leiden University — visa / residence permit and non‑visa deadlines for September and February intakes.

The earth has more than 7 billion inhabitants, all of whom leave behind traces of pollution. However, not all forms of pollution have the same harmful effect. Leiden scientists help determine where we should put our priorities.

Note: The Politics of Artificial Intelligence (MSc) application deadlines at Leiden University are 1 April for students requiring a visa, and 15 May for others.

You can register for semester 1 courses (academic year 2026/2027) from the 8th of June 2026.