Eiko Fried has been appointed professor of Mental Health & Data Science. This combined chair neatly fits the view that understanding complex mental health issues require the integration of statistical methods. ‘The idea that mental health problems are monocausal entities with simple etiologies is no…

With great sadness we share the news that Prof. Harold Linnartz passed away suddenly and unexpectedly on Sunday 31 December 2023. We are all in shock, and our thoughts are with his wife and children, other family, and friends. Harold was at the heart of our institute, as a researcher, as a supervisor,…

On 28 June, ten dedicated lecturers received their Senior Teaching Qualification (SKO). Rector Hester Bijl congratulated them in an online meeting. We asked some of them what this qualification means to them, what they believe ‘good teaching’ entails and what makes them so passionate about education…

If you study law, you won’t necessarily end up striding round a law firm in tailor-made suits. Alumnus Harrie Schoffelen certainly hasn’t: he made the conscious decision to follow another path in life. Together with his fiancée he runs a successful food truck on the tropical island of Bonaire. ‘Return…

In his leaving interview, Martijn Ridderbos doesn’t have to think long when asked what he is most proud of. ‘Bringing people together; creating things together. Reducing the gap between researchers and the staff who support them because the latter are essential. We’ve achieved that and the seeds have…

From one year to the next, face masks have started to appear in the environment. As the masks are discarded, they end up in the top soil, in sediment layers, and in refuse heaps. In a couple of generations archaeologists will study the layer that has already been labeled the Face Mask Horizon. Current…

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…

Education

The legal distinction between victims of human trafficking and victims of migrant smuggling is unjust, argues De Massol Rebetz in her PhD thesis. In certain instances, smuggled migrants should be treated the same as victims of human trafficking.

Marjolein van Reisen has been Institute Manager Finance for a year, and Wiesje Zikkenheiner has been Institute Manager HR for two months. This duo job is by no means a luxury in an ever-growing organisation. Marjolein: 'We’re both new to this world, so we have our hands full.'

They dreamed of Brussels, worked hard and finally succeeded: working for Europe. The list of Leiden University alumni in Brussels is long. A few days before the European elections, Julia Gencheva and Vincent Miča talk about how they ended up in Brussels and what their jobs entail.

The Faculty of Humanities is heading for a financial deficit in 2024 and subsequent years. After the report of the analysis core group, the Perspective 2028 steering group submitted their advisory in report in May. The Faculty Board has now has drawn up a Plan of Action, in consultation with the institutes…

As Board Secretary, Corry Donner aims to be a ‘spider in the web’; someone who keeps a watchful eye on and brings together all the different perspectives of the institute’s board. Now she's left her carefully woven web at the university and transfer her tasks to her successor. Last September, we talked…

How has progress been made on diversity and inclusion at Leiden University over the past decade? Attendees reflected on this at the D&I Symposium 2024: Untold Stories. And in the workshops, students and staff discussed the next steps toward a more inclusive community.

As University historian, Pieter Slaman researches the University’s past, but he’s equally interested in its present. ‘It’s useful to be familiar with issues from the past. Not to be rooted in the past because some developments from history are things you definitely don’t want to repeat.’

The University wants to improve its support for contract and external PhD candidates. A taskforce headed by Dean of FGGA Erwin Muller has made over fifty recommendations, varying from an improved PhD portal and flexible work places on the campus to the right to vote in employee participation bodies.…

Over the past five years, medical anthropologist Annemarie Samuels has studied palliative care in different parts of the world. Over the next five years, she will focus on end-of-life care in the Netherlands. 'Everyone has the right to good care at the end of their life, but what that means differs…

Academic ceremony

Our aim with the Humanities Campus is to create a sustainable and attractive campus with ample green spaces and opportunities for interaction, complemented by modern and future-proof facilities. The campus is being developed in stages. On this page, you can find information about the planning, latest…

Lecture, CHiLL series

Conference, Symposium

Leiden University researchers will be working more closely with colleagues at Una Europa partner universities this year. Three research projects have been awarded up to €40,000 in Una Europa seed funding to explore questions related to democracy and AI, web tracking technologies and clean energy.

What effect did the lockdown have on young people? Leiden researchers started a study of this in the first year of the covid pandemic. They discovered an impact on the development of the brain areas involved in social behaviour. The researchers published their discovery in Scientific Reports at Nat…

Jasper Knoester is the dean of the Faculty of Science. How is he doing? What kinds of things is he doing and what does his day look like? In each newsletter Jasper gives a peek into his life as dean.

Claartje Levelt is professor of First Language Acquisition. She researches how babies and toddlers learn their mother tongue. Besides her work, she enjoys being involved with music.

Now that the Herta Mohr building is fully operational, construction work is moving to the other side of the University Library. Over the coming years, the former Matthias de Vrieshof will be transformed into the Aleida Nijland building. Architect Bart van Kampen tells us more about the plans.

What is it like to teach at an international school, surrounded by different languages, cultures and educational traditions? The World Teachers Programme (WTP), a profile within the teacher training programme at ICLON Leiden University, offers students the opportunity to experience this.

Thursday 15 January starts with a long journey and ends with an equally long working day full of current issues. Jasper visits the Mathematical Institute with the scientific directors of our faculty and attends a meeting on collaboration with the Ministry of defence.

When politicians claim they can make major differences with their migration policies, they’re raising false expectations. The opportunities for the government to restrict migration are in fact very limited. And what about the little room they do have? Mark Klaassen’s advice is to make use of those opportunities…

Studenten onderzochten maatschappelijke vraagstukken voor het project Leren met de Stad en presenteerden hun resultaten tijdens een informatiemarkt.

Moderne oorlogsvoering kent geen grenzen. Dreigingen zijn steeds vaker digitaal. Promovendus Annelies van Vark stelt dat Scandinavië beter voorbereid is op gevaar. Zij pleit voor een sterkere rol van de krijgsmacht, herinvoering van de dienstplicht en paraatheid – óók bij burgers.

At a work meal HR Policy Adviser Petra Boerlage and Associate Professor Robert Stein got talking about the ‘worlds’ of academic and support staff: are they really that different, they wondered. And wouldn’t it be good if staff knew more about each other? The two put their money where their mouths are…

When Sjoerd van Trigt, a student of International Studies, is not in the lecture hall, you can find him at Rowing Club Asopos de Vliet. He trains there seven times a week. Soon, he will be leaving for a six-month stay in Japan.

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

On 22 November, Tom Buitelaar, Assistant Professor at the Institute of Security and Global Affairs, presents his new book ‘Assisting International Justice’. Five questions to Buitelaar about the book and the book presentation.

From a powerful documentary to a heartwarming classic: four Leiden alumni have chosen their favourite films and will introduce them at Leiden International Film Festival.

A star does not just appear in the sky overnight. Its creation takes tens of thousands of years. Twenty years ago, astronomers took a picture of a star in its birth phase. The James Webb Space Telescope (JWST) could now capture that same star in much greater detail. This does not only provide beautiful…

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

Research

Hydrogen can help to solve the climate problem. At least, if we start producing it in the right, clean way. Leiden researchers mapped out the global environmental impact of hydrogen production and looked ahead to 2050. They published their work in Energy & Environmental Science.

‘In the field of AI, Leiden is still a relatively unseen university,’ says Thomas Dohmen. The brand-new Director AI Collaboration Center, would like to forge a Leiden AI collaboration network, with sustainable and impactful relationships between the university and civil society organisations. The question…

By chance, computer scientist Hans-Dieter Hiep (Leiden Institute of Advanced Computer Science and Centrum Wiskunde & Informatica) discovered a ‘gaping hole’ in a widely used method for evaluating software security. Hiep patched the hole, causing quite a stir in his field. 'It’s not pleasant when a PhD…

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

When you think of a library, you probably picture books – or students quietly studying. But for subject librarian Rutger de Jong, most of the work happens online. ‘We never throw anything away. Everything produced here in the name of science should remain findable.’

From choosing the right tools to locking your screen when you go to get a coffee: it’s often the little things that help you work securely. With our campaign ‘Check it: work privacy and security smart’, in the coming month we are focusing on protecting our information and data, including personal data.…

What will happen if the lights in a large part of the city are switched off? How many stars can you see without all that light pollution? This is what researchers, artists and the residents of Leiden are going to investigate during Seeing Stars Leiden on 25 September. ‘Leiden is the ideal place for…

Rosalien van der Poel has worked in every nook and cranny of the university over the past thirty years. Now she is stepping down as institute manager of the Academy of Creative and Performing Arts (ACPA) to enjoy her retirement. Last year, we spoke with Rosalien about her career.

On Tuesday November 25, 2025, Sarah Cramsey travelled with students from her masters seminar on 'New Approached to the Holocaust in Central and Eastern Europe' taught at the History Institute to Amsterdam for a unique opportunity. There, Lotte Sophie Groenendijk, an alumna of the History Research Masters…