The heat pump in the Herta Mohr Building has malfunctioned, causing the temperature in the building to drop. Work is currently underway to resolve the issue, but it is not yet known when the malfunction will be fully repaired.

Opening hours will change from 1 January 2026. From this date onwards, no teaching or research will be scheduled after 8 p.m. What are the new opening hours of the Pieter de la Court building? Monday: 7:30 a.m. to 8 p.m. Tuesday: 7:30 a.m. to 10 p.m.*…

Jennifer started as a PhD researcher at the Industrial Ecology department of CML in September 2022.

Valerie de Koeijer is Assistant Professor of Conflict Resolution and International Organisation at the Institute of Security and Global Affairs of Leiden University. Her research is on responses to disaster and climate change, with a focus on conflict and cooperation in the relationships between various…

Thijs van Dooremalen is an Assistant Professor within the Governance of Crises research group of the Institute of Security and Global Affairs. He researches how and why events can cause transformations within national public spheres (media, politics, policy making). He employs a mixed methods perspective…

Charlotte Boin is a PhD candidate in Governance of Crisis at the Institute of Security and Global Affairs. She’s fascinated by the effect crises have on social systems. For her PhD research, she studies how groups adapt to chronic threats when there are no easy or attractive options left on the table.…

17 October, 23:36 Due to a detected vulnerability in the university network, we are required to take temporary preventive measures. At this time, we have no indications that there has been any breach of the university’s network. However, this does mean that as of now, external access to the university…

Aimee Nelen is a PhD candidate at the Department of Clinical Psychology. She researches the mechanisms of rupture and repair events in psychotherapy sessions, the therapeutic alliance, Emotion-Focused Therapy (EFT), and psychotherapy training.

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What do climate change and traditional Japanese music have to do with each other? A great deal, university lecturer Andrea Giolai suspects. He has been awarded an NWO grant to study the relationship in more depth.

Dirkje Schinkelshoek, Executive director of the Faculty of Science, will become the new Director of Operations and Finances at NWO Domain Organisation (NWO-D) in The Hague as of 1 September.

Astronomers and surgeons from Leiden are collaborating with industry to develop an optical instrument that delivers faster, more accurate imaging of tumour tissue and abnormal blood flow during surgery.

Gisela Hirschmann is an Assistant Professor of International Relations at the Institute of Political Science.

Jasper Williams has been appointed as the new Operational Director of CML. He is succeeding Paul de Hoog, who held the position for over eleven years, initially as Institute Manager and later as Operational Director. Williams will assume the position on 1 February.

Yingjie Fan is an Assistant Professor of Stochastic Optimization at LIACS. Her research interests include stochastic programming, multi-objective optimization, robust optimization, machine learning, behavioral operations research and data-driven modeling in transportation science and supply chain risk…

In July 2023, Leiden University conducted another phase of its ongoing archaeological collaboration with the Kalinago Territory in the Caribbean island of Dominica. Activities focused on mapping and assessing coastal sites impacted by climate stressors, undertaking knowledge-exchange sessions, and co-creating…

In their February online meeting session, The Hague Program on International Cyber Security welcomes Matthijs M Maas for a talk about his new book Architectures of Global AI Governance: From Technological Change to Human Choice.

Sebastian Diessner is an assistant professor at the Institute of Public Administration at Leiden University. His research focusses on the politics of economic policy and has been published in academic journals including Perspectives on Politics, Socio-Economic Review, Review of International Political…

Michiel Veldhuis is an ecologist trying to understand the drivers of organization of communities and ecosystems, how this is affected by humans and its consequences for ecosystem services and stability.

Dr. Emilia Hannula is a soil ecologist passionate about all soil creatures and especially soil fungi.

On 22 January 2026, a meeting was held in the LUCL common room in the Reuvens building for the planned renovation of Aleida Nijland (formerly Matthias de Vrieshof). Future users of the building were given a preview of their new location on the Humanities Campus. The atmosphere was positive, and the…

In historical linguistics, cognates in related spoken languages are identified by the presence of regular, systematic correspondences. Such regular correspondences have not yet been identified among sign languages thought to be related, such as those of the French sign family. In consequence, sign historical…

From Saturday morning 31 January at 06.00 until Sunday 1 February at 23.59, the buildings on our campus will be closed due to scheduled maintenance to the university network. This concerns the Gorlaeus Building, Huygens, Oort and Sylvius. For Snellius and Van Steenis, please contact the building man…

The University's CO2 footprint has once again decreased. This is the conclusion of the 2022 Sustainability Report. The report also concludes that steps have been taken to integrate sustainability into Leiden University education and research.

On 24 January 2026, the Advanced MSc International Relations and Diplomacy (MIRD) hosted its Annual Reconnect & Gala, bringing together alumni from across the world, current students, and faculty. The event celebrated shared values, connection, and purpose, focusing on ‘The great shifts in international…