Philosophy of law is concerned with the the foundations of law.

Lecture

Leiden’s Institute for History has an exceptionally strong expertise in Medieval European History, with specialists whose interests cover virtually the whole continent.

Leiden chemist Roxanne Kieltyka is part of the 2018 Talented 12 list of the American Chemical Society. That was announced by the journal Chemical & Engineering News on 19 August.

How can our university really become inclusive? This is what students and staff discussed at our annual Diversity & Inclusion symposium. ‘It’s moving from a have-to to a want-to’

How have human-environmental entanglements changed in the Gulf of San Miguel, Darien, Panama, from the first traces human practices through to the present?

University ceremony

In less than two years’ time, Florian Volz and Timo Schmidt, both German students studying International Studies in The Hague, went from knowing each other only vaguely to sharing a small tent and a bank account. Sounds like any other ordinary relationship, right? Well, not exactly. These two honours…

Leiden researchers have developed a groundbreaking model to advance cancer immunotherapy. Using a 3D printer, they create mini-tumors within an environment that closely mimics human tissue. They have also developed a method to monitor real-time interactions of these mini-tumours with immune cells during…

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…

The university campus at the Leiden Bio Science Park is flourishing. A new book tells the stories behind this remarkable metamorphosis.

Two talented academics from Leiden who recently obtained their PhD have been awarded a Rubicon grant by the Dutch Research Council (NWO). The grant enables them to gain experience at a knowledge institute abroad.

Portraits that gaze at you and have moving stories to tell: HEAR ME NOW says what usually remains unsaid.

The opening of the new academic year highlighted students' and lecturers' personal motivators. Incoming students were encouraged to be bold, forge their own paths and grow by trial and error.

As of 1 November 2025, Professor Luc Sels will assume the role of President of Leiden University’s Executive Board.

For a long time, the painful history of colonial slavery received too little attention. People whose ancestors lived in slavery are now asking critical questions about how we should address that past. Leiden University researchers study the history of colonialism and slavery and their long-term impact…

How did colonial law work to turn people into property? This project argues that colonial ideas about households and domestic authority were critical to legal processes of enslavement in the early modern Dutch empire. Using colonial court records from Dutch Brazil, Suriname, and the Moluccas, the project…

Is your strategic vote actually strategic? How can the Netherlands form a stable government? And what should the next government do about migration, defence and the housing crisis? This is what our experts have to say.

When discussing enslavement, attention often focuses on Africans forcibly shipped to South America. Researcher Timo McGregor's new Veni research sheds light on a lesser-known method, whereby indigenous populations were enslaved through the households of colonisers.

With cancer, the immune system is a double-edged sword: it can attack tumour cells, but can also help them grow and spread. It is a question of harnessing it. This is what Professor Karin de Visser argued in her inaugural lecture on 15 November 2019.

The Oncode Institute is a new international network organisation that focuses on making sure that new scientific findings on cancer are implemented in patients as rapidly as possible. Two young female researchers at Leiden University have been selected to join Oncode: Laura Heiman (Leiden Academic…

Each scientific institute has its own dynamics. The Executive Board is visiting the different institutes to find out what is going on there. On 11 March, staff at the Institute of Tax Law and Economics talked to the Board about their teaching and research. What is going well and what are the challen…

The university is home to many pearls of research institutes that do not make the news every day. The Executive Board visited one such pearl, the Institute of Philosophy, on Tuesday 1 July. It resulted in an inspired conversation.

‘Let’s get everyone home safely!’ This was the message of an estimated 750 demonstrators as they marched through the centre of Leiden on 18 November.

Timo Schmidt and Florian Volz, both International Studies students, have travelled the route many refugees took to reach Europe by bike in the summer of 2016. Through crowdfunding, they want to finance their documentary about this journey. With three days to go, they are at 90% of their target amount…

On 10 January, Ben Van Rompuy spoke at the New Year's meeting of the Dutch Competition Law Association in Amsterdam.

One of LUCIR’s key objectives is to bring together scholars and students of International Relations. To this end, LUCIR regularly organises events such as conferences, roundtables, lectures and book launches.

In the Criminal Justice research programme, (criminal) law researchers and social scientists – many of whom are criminologists – collaborate on various projects. The research programme focuses on the content and form of decisions that could be, should be and are taken in by actors in the criminal justice…

In 2024, many of our students and staff won great prizes and secured important research grants.

From the energy transition in Namibia to sustainable jobs for young Nigerians, from African cookbooks to vodcasts on vintage Swahili booklets: during a recent visit by the Executive Board, staff from the African Studies Centre Leiden and the African Library presented their research, teaching and acquisition…

Cryogenic memories, antibiotic treatment for urinary tract infections and recycling plastic sustainably. These are the subjects of the three NWO-XS grants awarded to Leiden Science researchers.

From the 11th of May Ewa Snaar-Jagalska has been appointed Professor in the field of cellular tumor biology within the Faculty of Science at the Institute of Biology Leiden. Her research focuses on the cellular tumor biology and human cancer modeling in zebrafish

As of April 1, 2018, Erik Danen has been appointed as Professor of Cancer drug target discovery at the Leiden Academic Centre for Drug Research (LACDR). His discipline is cell biology of cancer, in which he focuses on the mechanisms underlying metastasis and therapy resistance.

Ewa Snaar-Jagalska, Shuning He and colleagues from IBL, LION and LACDR reported on a new zebrafish study to understand micrometastasis of human cancer cells. They discovered a novel role for neutrophils in assisting metastasis formation, which provides critical insights for anti-cancer therapies.

Zebrafish-human communication shows that cancer cells lacking a signaling protein are less able to develop aggressive metastatic properties. This discovery has been made by molecular cell biologist Claudia Tulotta. PhD defence 14 June.

On Thursday 10 January the annual Meijers prizes were awarded for the best published article, of each faculty research programme, written by Assistant Professors or other academic staff members. The winners received a certificate and a sum of money to spend on research.

The University Council meeting on 2 June was largely dominated by the demonstration, occupation and policing in The Hague last month.

Seven talented female scientists join the fight against cancer of the Oncode Insitute. Laura Heitman of the Leiden Academic Centre for Drug Research is one of the new Junior Investigators. ‘I hope to discover new druggable targets’.

One used 3D cell models to study colorectal cancer, while the other used machine learning for more efficient blood donation. For these achievements, Marieke Vinkenoog and Simon Christian Hansmann were awarded the Krijn Rietveld Memorial Innovation Award on Tuesday 2 September.

As of 1 November, Laura Heitman has been appointed full Professor of Molecular Pharmacology at the Leiden Academic Centre for Drug Research (LACDR). Heitman has been working on the understanding and improvement of drug-receptor interactions in early drug discovery. ‘My ultimate aim is to make medicines…

The International Health Regulations are a set of binding rules which organise the global response to viral outbreaks and other similar transboundary risks to public health.

Would you like to do collection-oriented research, but do not have sufficient resources? Every year, the Museums, Collections and Society (MCS) research group makes several research scholarships available for this purpose. Researchers Elizabeth den Hartog and Marika Keblusek previously received an MCS…