Why are morpho butterflies blue? That is what high school students Frederique Kerstens and Koen van Griensven investigated in their high school profile paper at the Leiden Institute for Research in Physics. In doing so, they won the KHMW Profielwerkstukprijs 2023. ‘We didn't expect it, but are of course…

The Global Summit, which took place from 12-16 January 2021, is an initiative by Richard Albert, the William Stamps Farish Professor in Law, Professor of Government, Director of Constitutional Studies at the University of Texas at Austin, and Founder & Director of the International Forum on the Future…

Research

Lukas Milevski is a lecturer in International Studies at the Institute for History. He introduces himself.

The project will further the development of policies, practices, and capabilities in responsible academic career assessment.

Organisation

Bram Slütter

A research team from Radboud University and Leiden University, led by senior researchers Prof. Masja van Meeteren (RU/UL), Dr Paul Mutsaers (RU) and Prof. Maartje van der Woude (UL), will examine what national and international research has really found about ethnic profiling by the police.

The Faculty of Humanities’ On-Campus Master’s Experience Day was a pleasantly busy event. The information sessions and corresponding information market went down well with interested undergraduates.

Leiden psychologists Janine Westendorp and Liesbeth van Vliet have investigated types of communication that seriously ill patients may experience as harmful. The results of this research were published in the American journal Cancer. And the results have now also been published as a poster for education…

Assistant Professor Juan Masullo of the Institute of Political Science has been awarded the 2025 Alexander George Best Article Award for his work on interviews and process tracing.

It was not light, but its absence that caught Stephanie Noach's attention a few years ago. With her research on darkness in art, she aims to show how darkness can question and sometimes even undermine colonial imagery.

Last week, Joris Larik, Assistant Professor of Comparative, EU and International Law, was mentioned in an article by Euronews about the SWIFT ban.

On March 11, a travelling photo exposition on the Mayan archaeological site El Mirador, in Guatemala, saw its festive opening at the Van Steenis building. For the occasion a special Faculty Lecture was organised, entitled 'Water Legacy: Mayan World Meets the Netherlands'. We were honored to receive…

The first settlers of the Caribbean have long been regarded as bands of highly mobile groups who subsisted exclusively by hunting, gathering, and fishing. In recent years, however, there has been increasing evidence for the cultivation of domesticated plants by early groups and a lower degree of mobility…

The Dutch Tax Authorities leaked information about an international tax audit to Uber. In addition, they ‘obstructed and delayed’ an investigation by other EU Member States, says the International Consortium of Investigative Journalists (ICIJ) based on internal documents from the tech company.

Four researchers from Leiden University have been awarded prestigious Vici grants the Dutch Research Council (NWO) has announced. The honoured applications are from researchers at the Faculty of Social and Behavioural Sciences, Leiden Observatory, the LUMC and the Faculty of Archaeology.

Latin America matters! With its rich history, culture, its impressive resilience and creative innovation in the face of such a diverse array of challenges, Latin America can indeed show the way forward inspiring for positive change. Working together with Latin American institutions, our researchers…

The Dutch Public Prosecution Service (OM) and the Netherlands Forensic Institute (NFI) want to use private DNA databases in an effort to solve deadlocked murder cases. Bart Custers, Professor of Law & Data Science at eLaw, Center for Law and Digital Technologies, expects that this is permissible from…

After ten years and one day, Leiden Observatory has a new director. As of 1 September, Ignas Snellen will set the course for the astronomical institute. In this interview, you will get to know Ignas. Or at least a little. That is why we gave him five dilemmas and asked the people around him who he really…

Nu in heel Europa rechtse partijen hoog scoren in de peilingen is de verwachting dat de discussie omtrent migratie flink opgeschud gaat worden. Desondanks maant hoogleraar Sarah Wolff tot kalmte.

It is with great sadness that we have learned of the passing of our former colleague dr. Karin Willemse, who passed away on Saturday 18 March 2023.

Several of the most important manuscript collections in the Leiden University Libraries (UBL) Special Collections, comprising 443 extremely rare and often unique volumes, have been made available in Open Access via Digital Collections. The available manuscript collections include the private collections…

In prehistoric times there was a huge wave of migration, from the steppes in Russia and Ukraine to West Europe. The newcomers’ genes began to dominate. Archaeology research in Leiden into burial mounds in the Veluwe and Utrechtse Heuvelrug areas of the Netherlands yielded this spectacular conclusion.…

It was challenging to get civil servants from the first Trump administration to speak about their work experiences, but sociologist Jaime Lee Kucinskas succeeded. The picture that emerged from her findings, she says, is far from positive. 'The more I spoke with them, the more emotions I saw. They were…

On 11 June 2025, the MA in International Relations (MAIR) Programme convened its 2nd Humanities & IR Graduate Conference at The Hague Campus (Schouwburgstraat), welcoming over sixty participants from twenty institutions in Europe, North America, and Asia.

The rapid economic development of recent decades has made China a destination for migrants from all parts of the world. What does Chinese migration policy say about the priorities and functioning of this global power? PhD candidate Tabitha Speelman has conducted research on this.

Two MEPs visited Leiden University on Friday 30 January. Their visit underscored the vital importance of the university’s expertise on Africa, Asia and Latin America in a rapidly changing geopolitical landscape.

On 11 December 2025, students and staff members from many fields of study had the opportunity to take part in a day-long workshop on the role of the senses in ancient religions.

Five projects with researchers from Leiden University have received a grant from the Dutch Research Council (NWO) to build or upgrade existing research facilities.

Timo McGregor recently joined the Institute for History as a NWO-Veni research fellow. His research explores legal and political thought in early modern European empires, with a particular focus on mobility, political belonging, and enslavement. Below he introduces himself.

‘I was very happy and honoured that my thesis was recognised as a valuable contribution to the topic of landscape archaeology.’

Hybrid Workshop: In person and online on 26 – 27 January 2023.

What did plays look like in the seventeenth, eighteenth or nineteenth centuries? With the new OverActing theatre festival, university lecturer Jed Wentz is trying to get closer to an answer to that question.

Three researchers from Leiden University have been awarded a Starting Grant by the European Research Council. The subsidy will allow the researchers to set up their own projects and put together a research team.

A bloody civil war has raged for years in the Central African Republic. PhD candidate Crépin Mouguia points out a tragic pattern: young people have been recruited as fighters or soldiers for generations and thus fuel the conflicts.

Sarah Wolff has been professor of International Studies and Global Politics since 8 January. Time for a brief introduction about her field and academic interests.

Sander van der Horst recently joined the Institute for History and the Royal Institute for Southeast Asian and Caribbean Studies (KITLV-KNAW). He is a PhD candidate in Cultural Histories & Decolonization in Southeast Asia. Below, he introduces himself.

It is late June, and on a windy meadow north of Leiden known as the Vrouw Vennepolder a group of archaeology students just hit the last ice age. Considering this involves manually pushing a ground core to a depth of 10 meters, this is no small feat. Even so, the taking of ground samples in this, at…

If you do research on Leidens Ontzet in Leiden, you can count on a lot of interest. But Leiden Kennisstad interns Marieke Nolten and Alexander Nuijten had not expected there would be quite so much interest. They concluded a year of research with the presentation of a scientific paper.

Is polder rice a feasible circular alternative to cows on peat soil? In May, an experimental trial began, with researchers from Leiden University and Wageningen University & Research (WUR) planting around 3,000 rice plants at the Polderlab near Leiden. The researchers aimed to test rice as a middle…

An international team of researchers led by Leiden archaeology professor Marie Soressi and Leipzig senior geneticist Matthias Meyer has recovered the DNA of a woman belonging to an Ancient North Eurasian population from a 20,000-year-old pendant. This is the first time DNA analysis has been used to…

Professor Jan Melissen (ISGA) is the recipient of the 2022 ISA Distinguished Scholar Award in Diplomacy Studies. It is the first time this prize has been awarded to someone in Europe. Melissen: ‘I am very honoured and humbled to be the first person to receive this award outside North America.’

For her research into migration policy under different political regimes, Katharina Natter has been awarded the Gratama Science Prize for young, talented researchers.

On Thursday, May 16, Leiden University Libraries is organizing a workshop on early photography of the Middle East. In the workshop, curator Maartje van den Heuvel shows photos of three adventurous Dutch nineteenth-century travel and photography pioneers. They created beautiful photos and photo albums…

Underwater noise from seismic surveys affects the behaviour of Atlantic cod. These are the results of research by Leiden biologists in collaboration with colleagues from Belgium. During such surveys the fish are less active than usual and their circadian rhythm is disrupted; soon after exposure they…

Eleven days, 100 films, various unique locations transformed into temporary cinemas. From 26 October until 5 November it’s once again time for the Leiden International Film Festival (LIFF). So which of these films are an absolute must for students and staff of Leiden Law School? An overview of our four…

17 November is International Student’s Day, dedicated to showcasing the international experience of international students in the Netherlands.

For my Policy in Practice research project, Elise van Dansik engaged with a problem that Leiden ‘Social Domain’ policy officers saw themselves confronted with, which was why migrant organizations of Slaaghwijk (a socio-economically disadvantaged neighborhood in Leiden’s north) do not cooperate with…

Money, cultural anthropologist Coco Kanters concludes in her dissertation, is not an intangible or acultural phenomenon. It is a ‘product’ that arises from specific values and can be used for certain goals.