For hundreds of years, the island of Sri Lanka was a crucial stopover for people and goods in the Indian Ocean. For the Dutch East India Company, it was also a crossroads in the Indian Ocean slave trade. Slavery was present in multiple forms in Sri Lanka—then Ceylon—when the British conquered the island…

This year, the International Institute of Air and Space Law (IIASL) attended the first days of the 41st Assembly of the International Civil Aviation Organization (ICAO).

For the third consecutive year, LACDR organized the international symposium on topology, Circuit Topology III, on November 29, 2023. The event aimed to bring together experts from diverse fields, including mathematics, computer science, physics, chemistry, and biomedical sciences, to discuss cutting-edge…

Is my cap on straight? Where in the cortège will I be walking? These are some of the questions asked by professors joining the Dies Natalis procession for the first time.

A school lesson by a professor, for instance about the history of Africa, the climate or research and healthcare. A hundred Leiden professors told primary school children about their work in the Meet the Professor project.

Maarten Feteris, the former president of the Court of Appeal and an alumnus of Leiden University, composed the piece ‘Intermezzo’ to mark the transfer of the rectorate during the Dies Natalis on 8 February 2021.

Carel Stolker, former Rector Magnificus and President of the Executive Board of Leiden University, has been made an Officer in the Order of Orange-Nassau for his services to the city and University. Mayor Henri Lenferink awarded the royal honour to Stolker at the University’s Dies Natalis on 8 February…

‘Praesidium Libertatis is a daily responsibility.’ These were the words of Rector Magnificus Carel Stolker on 8 February during the 443rd Dies Natalis of Leiden University. The University needs to pay continuous attention to open debate if it wants to remain a bastion of freedom.

On Tuesday 11 February, the European Data Protection Supervisor, Mr. Wojciech Wiewiórowski, visited eLaw, - center for Law and Digital Technologies at Leiden Law School to give a lecture on facial recognition systems and data protection in Europe.

The postdoc received the 2020 Thesis Prize for her PhD research on the role of the EU Member States in regulating and remedying corporate human rights violations.

Carbohydrates, alongside proteins and nucleic acids, constitute a crucial and versatile family of biomolecules present in all life forms. They manifest as monosaccharides, oligosaccharides, and polysaccharides, covalently bonded to proteins and fats. Carbohydrates are integral to plant and arthropod…

The skin protects the body from unwanted influences from the environment as well as excessive water loss. The barrier function of the skin is located in the stratum corneum (SC).

In this research note, Van der Does & Kantorowicz aruge that citizens that tend to experience political exclusion are often more supportive of direct and participatory forms of decision-making.

Leiden University will confer an honorary doctorate on astrophysicist Sara Seager for her work on exoplanets.

As a critical commemoration of its centenary, this book presents a mosaic of one hundred carefully curated fragments by expert authors, shedding light on politics, economy, society, culture, gender, and arts in a hundred years of Turkey.

This thesis describes the synthesis and biochemical evaluation of a variety of cyclophellitol based activity-based probes and inhibitors targeting various endo- and exo-acting retaining glycosidases. In the last two decades a variety of probes and inhibitors for (hemi)cellulose degrading enzymes have…

Promotor: G.A. van der Marel, Co-promotor: J.D.C. Codée

This thesis systematically studies the physicochemical properties of non-planar, propeller-shaped, polycyclic aromatic hydrocarbons. The synthesis of several so-called propellerenes is described on a gram scale, using optimized procedures aimed at using less hazardous reagents and reducing the amount…

Sheltering is an immediate human need and determines well-being andhealth.

Friso Selten recently started a PhD position that is part of the SAILS program. This PhD project is a collaboration between FGGA, LIACS, and eLaw, and is supervised by Bram Klievink (FGGA), Joost Broekens (LIACS), and Francien Deschene (eLaw). In the project Friso will investigate the influence of artificial…

Professor André Baranski is a champion for improving organ procurement. He believes there should be standardised training and certification for procurement surgeons. This is what he said in his inaugural lecture on 16 April.

Since 1919 the International Labour Organization (ILO) has been promoting the rights of workers worldwide. On 7 February, Leiden University hosted the symposium celebrating the 100-year anniversary of the foundation of the ILO. Leiden emeritus professor of International Labour Law Paul van der Heijden…

Four students founded the Leiden Student Working Group on Homosexuality on the day of the Dies Natalis in 1968. This was to be the start of the LBGT+ movement in Leiden, which celebrated its 50-year anniversary this year. What has been achieved and what is the status of emancipation today?

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…

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

Leiden University celebrated its 444th anniversary with a historical procession on 8 February. It celebrated this year’s Dies Natalis in time-honoured fashion with a ceremony in the Pieterskerk, but broke with tradition by sending professors out to primary schools.

Arts and culture

Are there general principles or values that should govern our actions as moral agents and/or as political subjects?

The current study focuses on Walpole’s social network and the language as contained in the letters of the network members.

This workshop intends to bring together early-career researchers from different fields working on international organizations, to discuss methodological challenges together with peers and established scholars. A combination of a master class, keynote lectures, and roundtable discussions aims at providing…

Asian Studies at Leiden University is unparalleled in the Netherlands and combines the very best of Asia-related research in North-West Europe.

Orange the World 2025

The Tappino Area Archaeological Project aims to map and analyze ancient settlement patterns and dynamics in a small valley in Central-Southern Italy, in modern Molise (province of Campobasso). The first sites in the area date to the Bronze Age. In the Iron Age to Classical period, it was reportedly…

On the university’s birthday, professors teach a class of 10 and 11-year-olds during Meet the Professor. The professors were bombarded with questions.

Earlier this month, the Europa Institute organized an internal discussion on the German PSPP-judgment. For the first time, the German Constitutional Court declared acts of EU institutions as manifestly excessive and thus as ultra vires acts under German constitutional law. During an online debate, various…

Scholars interested in European law attended a conference in Praag to present their research, exchange ideas and reconnect with colleagues and friends.As Vice-Secretary General of the ELU-S, Martijn van den Brink played a crucial role in organizing the conference.

This thesis focuses on data found in the field of computational drug discovery. New insight can be obtained by applying machine learning in various ways and in a variety of domains. Two studies delved into the application of proteochemometrics (PCM), a machine learning technique that can be used to…

Benjamin Marius Telders, professor of international law, died of typhus in Bergen-Belsen on 6 April 1945. He was an example of civil courage before and during the occupation. He spoke up against inequity and injustice.

Citizens’s attitudes towards trade are not only about the (perceived) economic effect. Commerce also has a variety of security implications. Employing an original experiment, political scientists Matthew DiGiuseppe (Leiden University) and Katja Kleinberg (Binghamton University) demonstrate that security…

Promotor: E. Bouwman, Co-Promotor: S. Bonnet

Promotor: H.V.J. Linnartz

Viral hemorrhagic fever (VHF) is a group of acute diseases caused by highly infectious viruses including Ebola, Lassa, Dengue viruses. Its high mortality rate poses high risk to public health, however, studies on VHF have been hampered due to the non-availability of proper models and incomplete knowledge…

Is the legitimacy of law and governance of multilevel jurisdictions diminishing? What is the significance of (diminishing) legitimacy for the effectiveness of law? These kinds of questions about the legitimacy of the supranational formation of law, its application, and the policy and governance based…

Russian Cellist and ACPA researcher Maya Fridman is organizing many benefit events together with Russian and Ukrainian musicians to raise funds for Giro 555 for Ukraine.