Erik Kwakkel, researcher at the Faculty of Humanities, has found an extraordinary manuscript in the University Library’s extensive collection of medieval books. The book in question dates back to the first half of the eleventh century and is made entirely out of waste left over from the production of…

In June 2024, the University of Groningen organizes a summer school, titled "Things that Matter". The Summer School explores challenges in digitizing source materials, questioning distinctions between physical and digital copies. It delves into the impact of virtual collections and criteria for digitization,…

The high prevalence of pure red cell aplasia in Thailand has been associated with the sharp increase in number of recombinant human erythropoietin (rhEPO) copy products, based on a classical generic regulatory pathway, which have entered the market.

Tens of thousands of soldiers and civilians have died as a result of Russia’s invasion of Ukraine in February 2022 and the continuing armed conflict. Many forms of critical infrastructure have been destroyed. Much of this devastation has been caused by weapons that utilise forms of artificial intelligence…

Supervisor: Natalia Ortiz Zacarías

This is the 2017 paperback release of William Michael Schmidli's The Fate of Freedom Elsewhere, which won the 2013 Foreign Affairs Magazine Best Book of the Year.

The 2006 United Nations Convention on the Rights of Persons with Disabilities differs markedly from other forms of international human rights law: it not only protects the rights of individuals but also addresses interpersonal relations and social structures. How did the convention attain this broad…

The publication Making Matters - A Vocabulary for Collective Arts marks the end of the NWO project 'Bridging art, design and technology through Critical Making', led by Janneke Wesseling and Florian Cramer. The book contains the outcomes of this project.

Stam defended his dissertation ‘Freedom of speech and the suppression of discrimination in the Netherlands: a constitutional-developmental approach’ on 12 November 2025. The doctoral research was supervised by Afshan Ellian and Bastiaan Rijpkema

What do scholars do when they talk about virtues (impartiality, accuracy) or vices (dogmatism, prejudice)?

In the studies described in this study, we introduce a novel ex vivo human skin barrier repair model. To develop this, we removed the upper layer of the skin, the stratum corneum (SC) by a reproducible cyanoacrylate stripping technique.

The project investigates the implementation of policies and practices related to reconciliation and the strengthening of government capacity in the Odesa and Kharkiv regions of Ukraine.

On the 2nd of September Jiyan Qiao successfully defended a doctoral thesis and graduated.

In Freedom on the Offensive, William Michael Schmidli illuminates how the Reagan administration's embrace of democracy promotion was a defining development in US foreign relations in the late twentieth century.

The eighth issue of the JLGC explores the diverse and interdisciplinary research on our multifaceted relationship with animals which is currently taking place, re-examining the relationship between humans and animals, and the definitions involved.

On 21 Januari 2020, Patrick van Berlo defended his thesis 'Human Rights Elephants in an Era of Globalisation: Commodification, Crimmigration, and Human Rights in Confinement'. The doctoral research was supervised by Prof. J.P. van der Leun and Prof. M.A.H. van der Woude.

When do fire making tools appear in prehistory, and how might the use of these tools manifest in the archaeological record?

In this thesis, the role of mast cells in atherosclerosis and novel therapeutic strategies to inhibit atherosclerosis progression are discussed. The first part of the thesis specifically focuses on the relation between mast cells and advanced human atherosclerotic plaque characteristics.

Clinical development of drugs for central nervous system (CNS) disorders has been particularly challenging and still suffers from high attrition rates.

This is a joint PhD of the Faculty of Social and Behavioral Sciences at Leiden University and the Evolutionary Ecology Group at Antwerp University.

Have you ever stood in front of an abstract artwork and thought: “a monkey could have done that!”. As it turns out, you are wrong.

Leiden University is announcing its approach to sensitive collaboration with external partners.

Almost three years after receiving her honorary doctorate, Dr Graça Machel returned to Leiden University. Over the course of two days she spoke with students, researchers, and other interested persons, about human rights – particularly those of women and children – in a world in which these are continually…

Human-driven environmental damage is increasingly recognised as a global crisis. Should large-scale destruction of ecosystems be considered a crime? The concept of ecocide has gained renewed attention, particularly following a proposed definition for inclusion in international criminal law, raising…

This PhD-thesis presents a study on micron-sized particles, so-called colloids. By controlling the chemical and physical properties of these particles, such as the interparticle interaction and the particles’ shape, colloids can act as building blocks that self-assembly into larger structures.

This thesis investigates how cell shape and collective behavior influence the dynamics and structure of biological tissues, which are crucial for understanding processes like embryonic development, tissue regeneration, and metastasis.

With the help of quantum mechanics, digital quantum hardware may be able to tackle some of the problems that are too difficult for ordinary computers. But despite these expectations and the ongoing effort of the research community, reliable quantum computers are not yet realized in a lab setting.

Electron microscopy has become an extremely important techniquein a wide variety of elds.

Investigating epistemic and ethical practices in medical experimentation on humans in the colonial period in Southeast Asia.

How have human-environmental entanglements changed in the Gulf of San Miguel, Darien, Panama, from the first traces human practices through to the present?

The thesis describes the development, synthesis and biological evaluation of several proteasome inhibitor designs. Mainly, this work focusses on designing proteasome inhibitors that selectively inhibit the immunoproteasome, while leaving the constitutive proteasome mostly, if not completely, untouch…

The individual in the EU: The application of insights from social psychology to improve the legitimacy and conflict-solving capability of the EU

Large parts of the research described in this Thesis aims at the development of oligopeptide-masked toxins and their in situ immunoproteasome-mediated activation.

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

Promotor: Koen Kuijken Co-promotor: Henk Hoekstra

In Humanity’s End As A New Beginning, Emeritus Professor Mineke Schipper reflects on myths about ‘the end’.

Does foreign aid promote human rights?

This summer school focuses on the emergence of sexual orientation, gender identity (SOGI) and intersex issues in different areas of international law, such as human rights law, refugee law, international economic law, and international criminal law. Details on the application for this edition are available…

Since its inception, a central preoccupation of and for the International Criminal Court (ICC) has been the nature of its relationship to national jurisdictions. Complementarity—the idea that the Court is intended to supplement, not supplant, national jurisdictions—has been the dominant juridical logic…

Collecting as much information as possible about administering a new medicine to people can save a lot of money.

PhD defence

PhD defence

Analysis of drug adversity

NTER-SECTION is a peer-reviewed, open-access journal focusing on contributions from junior archaeological researchers at Leiden University. The journal offers an accessible platform for the publication of individual research by undergraduate and graduate students. The Editorial Board consists of PhD…

A glittering visualisation of dark matter by Dutch artist Thijs Biersteker is on display in the Science Gallery at Trinity College Dublin. The installation – ‘Dark Distortions’ – was inspired by Euclid, a forthcoming ESA mission to study the mysterious nature of dark matter. Leiden astronomer Henk Hoekstra…

Imagining Urban Complexity introduces passionate and critical perspectives on the link between the humanities and urban studies.

The factors that dynamically sculpt the inter-regional correlation of brain patterns are poorly understood. Here, we test the hypothesis that they are shaped by the catecholaminergic neuromodulators norepinephrine and dopamine.

You can ask virtual assistant Siri about the weather, but you can’t have a real conversation with it yet. You can’t refer to anything that’s been said before, or ask the system why it says what it says. Stephan Raaijmakers, Professor by Special Appointment from TNO, hopes to change this.