Combined hormonal contraceptives (CHC) are associated with an increased risk of venous thromboembolism (VTE). In 2013, a review was published by the European Medicines Agency (EMA). In this review, the authors concluded that the risk of VTE varies by the type of progesterone in the CHC. Subsequently,…

The Organ Art of the first female German concert organist and Bremen Cathedral organist and

Promotor: Prof.dr. G.P. van Wezel

Promotor: M. Ubbink, Co-promotor: G. Siegal

This thesis describes the synthesis and biological evaluation of TLR2/6, TLR4, TLR7/8 and TLR9 ligands, of which the activity can be conditionally controlled.

The cannabinoid receptor type 2 (CB2R) is associated with several inflammatory diseases with an unmet medical need (e.g. Alzheimers, multiple sclerosis, reumatoid arthritis). Development of new chemical biology strategies to study this protein is essential to aid future development of drugs for these…

Carbohydrates, or sugars, are the most diverse and most abundant biomolecules known. However, the isolation of carbohydrate samples in sufficient amounts and purity is often impractical or even impossible, so the chemical synthesis of glycosides becomes relevant. The glycosylation reaction, in which…

The long-held desire - to link structure directly to function and to explain molecular mechanisms based on basic chemical or physical principles - is finally coming closer, satisfying not only our scientific curiosity but also offering new solutions to the many challenges in the field of health, energy…

Kinase inhibitors are key therapeutic agents, particularly in oncology, yet their clinical efficacy is often hampered by off-target effects and limited understanding of their cellular target profiles.

The adsorption of D2 and CO2 on catalyst surfaces is studied using a molecular beam in ultra-high vacuum.

The electrochemical hydrogenation reaction is an alternative approach for the transformation of unsaturated bonds without the use of flammable dihydrogen gas.

PhD defence

Haunting the future through poetry

On Wednesday 3 September 2025 Yu Ai successfully defended a doctoral thesis and graduated.

Are you thinking about studying abroad for a semester? We came across two students who want to share their experiences with you.

On 2 September 2022, 300 students received their Bachelor Diploma of International Studies. The students were awarded their diplomas in the historic Pieterskerk in Leiden, in front of a large audience of family and friends. With about 1000 people present, including the graduates, the International Studies…

On Friday 23 June, the Austrian Studies Fund was established with a festive gathering in the Faculty Club. This fund is the successor of the Austrian Studies Foundation and will continue and expand the program of activities of the Central European Studies chair at Leiden University, which was established…

The Leiden Jewish Studies Association is pleased to announce a call for nominations for the

New results from the Kilo-Degree Survey (KiDS) show that the Universe is almost 10 percent more homogeneous than previously thought. The new KiDS map was created using the partly Dutch OmegaCAM on ESO's VLT Survey Telescope on Cerro Paranal in Northern Chile. An international team of astronomers from,…

The Fourth Annual Leiden Austrian Studies Lecture “Was the Habsburg Empire an Empire?” was given by Professor John Connelly on Monday, March 20, 2023 at Leiden University’s Faculty Club.

On Friday 29 August 2025, 370 students received their Bachelor's degree in International Studies. The diplomas were awarded in the historic setting of the Pieterskerk in Leiden. Family members, friends, and staff gathered to celebrate this joyous occasion with the graduates in a packed Pieterskerk.

On Wednesday 1 September, the first thirteen students of the new BA Urban Studies at Leiden University, received their diplomas in person in The Hague. During a festive graduation ceremony, they were congratulated by rector magnificus Hester Bijl.

The Foundation for Austrian Studies and the Institute for History are very glad to announce that Monika Baár has been appointed as the holder of the Special Chair for Central European Studies.

Are you interested in the BA programme International Studies but not yet sure what it all means?

Chinese materia medica (CMM), comprising a diverse array of natural substances from plants, animals, and minerals, has been integral to Traditional Chinese Medicine (TCM) throughout history. This study investigates the dynamic evolution of CMM, noting shifts in species for improved therapeutic effects…

On Monday 26 August, students were warmly welcomed at the Wijnhaven location with a blue carpet and live music. Accompanied by their friends and family, they gathered to receive their BSc Security Studies diploma.

On Wednesday 14 February 2024 Yorum Beekman successfully defended a doctoral thesis and graduated.

Amidst today’s armed conflicts, authoritarian governments, cyber-attacks, organized crime, economic insecurity, and ecological destruction, it can be hard to imagine peace. What do we mean by ‘peace’, beyond the absence of war? What kind of peace are we seeking? What makes people and society at peace?…

Leiden University’s Executive Board has appointed Erwin Muller as Vice Rector of Organisational Development. In this role, he will help further professionalise and improve the university’s organisation as per the Strategic Plan.

On 22–24 October 2025, Leiden University welcomed scholars, policymakers and higher education leaders for the Una Europa Conference on Academic Freedom. Organised by the AFITE project team and supported by Una Europa Seed Funding 2024, the three-day programme examined current pressures on academic freedom…

Leiden Observatory is going to use a new technique to carry out calculations on gravitational lensing measurements. They will do this is the context of research into the formation of elliptical galaxies. Alessandro Sonnenfeld (University of Tokyo) who developed this technique joined the research team…

Cells in our body are constantly performing small tasks, such as repairing wounds. They exert force by changing shape. But how do cells translate their shape into exerting a force in a specific direction? Experimental and theoretical Leiden physicists have now found a clue to answer this question. Cells’…

During their second year, the students of the bachelor Security Studies get a feeling of what their professional career might look like.

On Friday 29 August, the Wijnhaven was filled with a special mix of first-year students just beginning their academic journey, and students who, after 1,089 days of intensive study, were awarded their Bachelor’s degree in Security Studies. In two festive sessions, a total of 223 students received their…

Cramming from a book, making notes or learning summaries. In the past these were about the only ways to memorise your course material. But that has long since changed. Multimedia is the code word. But is it effective?

Nuran Buket Cengiz defended her thesis on 13 June 2017

On 17 January 2024 Ying Wang successfully defended a doctoral thesis and graduated.

Beatrice Noun (alumna BA International Studies) currently lives in Paris and works for the World Bank as a consultant while doing a master’s degree at Sciences Po in International Development. We caught up with her and asked her a bunch of questions like which steps lead her to this career path? And…

Interested in an internship at the Dutch Ministry of Defence? Good news! Leiden University and the Royal Netherlands Air Force have formalized their cooperation to offer students an unique opportunity to conduct an internship at an active military base in Woensdrecht, the Netherlands.

Research conducted in this group aims at furthering our understanding of how communities and individuals deal with social change, conflict and trauma through remembrance and commemoration as well as forgetting in the arts.

Something that a year ago would have been unthinkable has become a reality on 12 June: Donald Trump and Kim Jong-un sat down together to talk about nuclear disarmament. Can these two hardliners reach agreement in the negotiations? Professor of Korea Studies Remco Breuker is doubtful. 'As it looks now,…

LUC The Hague congratulates the authors of this year’s Theses of Merit and the winner of the Brill Prize 2016!

Dr Kosta participated in the ECB Legal Conference 2021 titled ‘Continuity and change – how the challenges of today prepare the ground of tomorrow’. Dr Kosta spoke in the ‘Symposium on Proportionality’ and presented a taxonomy of the principle of proportionality in EU law based on the interest that it…

Ziyang Gao received the Stieltjes Prize from Koen Becking, chairman of the Executive Board, for his thesis 'The mixed Ax-Lindemann theorem and its applications to the Zilber-Pink conjecture'.

In the future top Dutch speed skaters may skate even faster thanks to a skate full of electronics. This ‘measuring skate’ gives top skaters and coaches information about the skater’s technique and motion. It can measure the dynamics at play between the foot, the ice and the skate.

The Executive Board is delighted to announce that Joanne van der Leun took up the position of the university’s Academic Lead International Affairs as of 1 January 2025.

Wout Broekema is shortlisted for the Els Witte Prize 2019, an award for best Doctoral dissertation in political science. The prize is instated by the Nederlandse Kring voor de wetenschap der Politiek (NKWP).

On March 27th, 2015 the biannual Dutch Medicinal Chemistry Prize for the best Dutch Ph.D. thesis in the field was awarded to Dr. Dong Guo, a current postdoc researcher in our lab, by the Section of Medicinal Chemistry of the Royal Netherlands Chemical Society.