Today, 189 out of 193 officially recognised nation-states have a written constitution, and 75% of these have been ratified since 1975. How did this worldwide diffusion of constitutions come about?

This dissertation presents the synthesis and evaluation of antibody recognition for various capsular polysaccharide (CP) fragments of Staphylococcus aureus (S. aureus).

This dissertation explores new chemical strategies for the synthesis of self-adjuvanting peptide conjugates and immunomodulatory ligands aimed at targeted activation of the immune system.

On 23 April, Andreas Häuselmann defended the thesis 'EU privacy and data protection law applied to AI: unveiling the legal problems for individuals'. The doctoral research was supervised by Gerrit-Jan Zwenne and Bart Custers.

Up to 45% of patients with Parkinson's disease experience impulse control disorders, characterised by a loss of voluntary control over impulses, drives or temptations. This study aimed to investigate whether previously identified genetic and psychiatric risk factors interact towards the development…

From corpus pragmatics and metapragmatics to accountability and intentions, and from conversational structure and im/politeness to the role of emotions in utterance interpretation, the short articles collected here represent not just the wide scope of Michael's own work but also a snapshot of the field,…

A study of Dutch Fort at Galle, Sri Lanka

In this project, researchers and lecturers from LUCAS, ICLON and UBL join forces to publish expertise and experience in the field of machine learning and AI as open learning materials for secondary education.

, Maliebaan 30, 2311 CC, Leiden

PhD defence

PhD defence

The LUCDH foster the development of new digital research by awarding a number of Small Grants each year. As in previous years the LUCDH received a large number of excellent grant applications for Research and Personal Development funds. Congratulations to the recipients of this year's research award…

In this project we develop algorithms to automatically detect a particular type of archaeological sites in satellite images of the Alps.

Tell Sabi Abyad is a major Late Neolithic settlement mound in Northern Syria, belonging to the seventh and early sixth millennium bc. This book presents the results of large-scale fieldwork conducted at the site between 1994 and 1999, under the auspices of the Netherlands National Museum of Antiquities…

The Ada Lovelace Distinguished Lecture Series brings outstanding computer scientists from around the world to Leiden University. The lecturers will share exciting ideas and results from the forefront of computer science.

Programme

Hybrid Intelligence (HI) is the combination of human and machine intelligence, expanding human intellect instead of replacing it. HI takes human expertise and intentionality into account when making meaningful decisions and perform appropriate actions, together with ethical, legal and societal values.…

The Tatiana Afanassjewa-lecture series was a series of public talks in Dutch that was started during the Covid-19 lockdown. The talks were given by Leiden physicists on wednesday evenings, intended for everyone with an interest in physics.

A hot topic in educational sciences is whether and how reading medium (paper vs. screen) affects reading comprehension. Especially in the media – but also in schools – their appears to be a preference for texts presented on paper: Paper texts are thought to induce a more intensive reading strategy,…

Worldwide resurgence of pertussis necessitates the need for improvement of pertussis vaccines and vaccination strategies.

The Centre for Indigenous America Studies (CIAS) at Leiden University is designed to coordinate and promote the teaching and research of Indigenous languages, literatures, cultures and cultural heritage.

Latif Fauzi defended his thesis on 18 May 2021.

On Thursday 1 December 2016 at 13.45 hrs, Francisco Sepulveda Ramirez will defend his doctoral thesis ‘Residence in Tax Treaties' at the Academy Building of Leiden University. Supervisor is Professor F.A. Engelen.

Glycoconjugate vaccines are composed of microbial poly- or oligosaccharides covalently linked to a carrier protein.

Since 2022, a higher proportion of people in the Netherlands have been victims of cybercrime than of 'traditional' crime. The Bachelor in Cybersecurity & Cybercrime trains you to become an all-round cyber expert, equipping you to take on the fight against cybercrime.

The role of domestic and wild resource exploitation in Bronze Age subsistence

The International Arbitration Training Course, offered by Leiden Law School in cooperation with the Permanent Court of Arbitration, focuses on the theory and practice of international arbitration as a distinct field of the law and field of legal practice. Registration is now open!

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.

Researcher Lianne Visser has been awarded the G.A. van Poelje Prize for the best dissertation in public administration of the past year. It is a renowned award for doctoral research in public administration in the Netherlands and Belgium.

Responsible AI for science and a strong and resilient society.

Spatial technology such as virtual reality can help patients who have difficulty with spatial cognition, for instance if they keep on losing their way. In her inaugural lecture, neuropsychologist Ineke van der Ham will talk about the importance of avatars, the patient experience and room for innovat…

The Faculty of Social and Behavioural Sciences is committed to being a safe, comfortable, and equitable space for both staff and students: a place where a diversity of people feel valued and welcome, where there is room for a diversity of perspectives.

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

At FSW, we carry out remarkable projects in research and education. Interdisciplinary, driven by our values, and in collaboration with the world around us. We are pleased to highlight some of our most outstanding projects. This is our 2024 annual overview.

An effective and equitable approach to resource conflicts?

Leiden University provides ambitious students with the most recent and innovative areas of knowledge, and offers them the freedom to develop their own area of expertise.

Leiden University was the first university to be established in the Netherlands. William of Orange gave Leiden Academia Lugduno Batava in 1575, it is said in recognition of the city’s courageous resistance against the seige by the Spanish invaders.

How do plant defense genes get activated?

The Tatiana Afanassjewa-lecture series is a series of public talks in Dutch by Leiden physicists on wednesday evenings, intended for everyone with an interest in physics.

Many students have difficulties to read and give meaning to algebraic formulas. In this study it is explored whether graphing formulas with pen and paper will improve students’ability to reason with algebraic formulas.

The CS-NL network is a vibrant and active community of Citizen Science practitioners, initiators, researchers and participants from across all corners of society (Academia, Industry, Government, Civil Society, and Citizens) who come together to share knowledge and know-how for participatory research…

About nine million people worldwide contract tuberculosis each year. Research into new treatment for this disease has received fresh stimulus with more efficient techniques and a new understanding of how the tuberculosis bacteria works.

This project looks at the current practices of marriage law in Indonesia. It examines the often ambiguous views different groups hold of marriage, from local villagers in Bengkulu to women’s activists in Jakarta, and how these relate to the development of national law on the one hand and local practices…

Archaeological and Historical Perspectives on Eastern Cuisine and Western Foodways

Lecture