From BBC film shootings to a video of snowy Leiden and from bikes in the canal to our birthday, the Dies Natalis. This was our year in 12 Facebook posts!

Universiteit Leiden stond niet altijd bekend als een bolwerk van vrijheid, betoogt Egbert Koops in zijn diesoratie. Leidsch Dagblad sprak met de hoogleraar rechtsgeschiedenis over academische vrijheid: ‘Het bolwerk van vrijheid moest veroverd worden.’

‘What if we switch off all the lights one evening? That idea crossed my mind from time to time. And when I mentioned it to a taxi driver one day, he said: “Oh, you mean: lights out, stars on!” That’s not completely true, of course, because the stars are always on, but his phrase summed up the idea n…

Political scientist Leila Demarest tells about her research to Nigeria’s National Assembly. How do politicians cooperate and how are public resources distributed among the different regions?

The speed at which science is changing our lives gives rise to tensions and concerns. In his talk at Leiden University, Minister Robbert Dijkgraaf (Education, Culture and Science) said we should talk more about science’s relationship with society and political decision-making.

Since 2000 the Leiden Student Council (LSR) yearly awards a prize for the best teacher of the university at the Dies Natalis.

You can't have missed it: Leiden University celebrated its 444th anniversary in 2019 with a year-long programme of activities for the people of Leiden and The Hague. The Dies Natalis on 7 February 2020 marks the end of this special year. High time to look back at what we did!

On 8 February 2016 prof. Jennifer Chayes received her Honorary Doctorate at Leiden University as part of the 441e Dies Natalis. A video registration of this special event has now been published. For the ceremony of Jennifer Chayes’ Honorary Doctorate, please scroll to the 82th minute.

Each year on the university’s birthday, children at primary schools in Leiden and The Hague have a lesson from a professor – about children’s rights and robots in surgery, for example. The children get to do activities. And ask questions: ‘How do you become a professor?’

Leiden University is celebrating its 450th anniversary in 2025 with a feast for the eyes, ears and spirit. The anniversary year opens with an extra special Dies Natalis on 7 February. Highlights includes an alumni festival, three exhibitions and a canal concert.

Following the format of Privacy Law Scholars Conference (PLSC) in the United States, PLSC Europe is a conference for stimulating work in progress. Discussants, rather than authors, kick off and lead a conversation on a paper. There are no panels or presentations by the authors. Attendees read papers…

How can Europe lead the way in vaccine development that is fast and for all? To answer this pressing question, Professor of Vaccinology Meta Roestenberg is holding a panel session on 14 July at the EuroScience Open Forum in Leiden.

Den Haag is de stad van vrede en recht. Rondom deze thema’s organiseren culturele en maatschappelijke organisaties het festival. De Universiteit Leiden is nauw betrokken bij de organisatie. Universitaire medewerkers en studenten doen bijvoorbeeld mee aan de Vredesloop, Marieke Liem van het Institute…

Consumer grade smartwatches may not be as accurate as promised when measuring tiredness or stress. That is the conclusion of researchers Björn Siepe and Eiko Fried based on a comparison between smartwatch measurements and self-reports by users.

In recent years, artificial intelligence has deeply permeated our society and the legal field is no exception. Bart Custers, Professor of Law and Data Science, spoke to ‘Mr. Online’ about AI and the law: ‘AI is currently a hype.’

Although Dick Schoof, of no party affiliation, has been nominated by the four coalition parties as the new Dutch Prime Minister, various experts have expressed doubts. Can he lead the new cabinet? Wim Voermans, Professor of Constitutional and Administrative Law, spoke to 'RTL Nieuws'.

The Iraqi archaeological site of Nimrud was recently recaptured from IS. The site has been severely damaged. The question now is, what to do with it? Should it be restored? Bleda Düring spoke with Trouw about this complex issue.

Sonja Barend distantieert zich van het toneelstuk Sonja, dat gebaseerd is op haar boek. Dirk Visser, hoogleraar intellectueel eigendomsrecht, gaf uitleg in het AD: ‘De auteurs hebben het recht om te zeggen dat ze niet meer achter de productie staan.’

Leiden biophysicist Stefan Semrau was granted an NWO Vidi earlier this month. He will use the grant to study the role of electricity in embryonic development and tissue regeneration.

On 9 February, 2015, the 440th Dies Natalis, Peter J. Katzenstein will be awarded a Leiden University honorary doctorate in recognition of his contribution to the social sciences in general, and to political science in particular. Professor Katzenstein (Cornell University) is one of the most influential…

Archaeology can help us reflect critically on our European identity. This is what David Fontijn will claim in his inaugural lecture on 18 March.

Leiden University is awarding an honorary doctorate to virologist Marc van Ranst. Van Ranst has been one of the main advisers of the Belgian government during the Covid pandemic. German Arabist Beatrice Gründler will also receive an honorary doctorate for her work in the field of Oriental Manuscript…

Lifelike gods, provisional professors and the city militia with weapons a clanking. Leiden put on a colourful procession and drummed up hundreds of citizens to celebrate the foundation of the first university of the Republic of the Netherlands on 8 February 1575. 'It wasn't a party just for the sake…

Australian cell biologist Melissa Little and Dutch physicist Robbert Dijkgraaf will each be awarded an Honorary doctorate at the Dies Natalis of Leiden University in February 2019. They are receiving these awards for their services to science.

Stéphanie van der Pas won the Leiden University Thesis Awards 2014 with her thesis

What should we do about litter in the countryside? Can you tell from camera images if someone is guilty? And what does your heart rate really look like? Get answers to these questions and more at the free ‘Wijsneus Festival’ on Friday 16 September at Leidse Hout Park.

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…

Master’s students in the Honours Class ‘Leiden, City of Refugees?’ were asked to contemplate the concept of ‘the other’ from both an academic and an artistic perspective. The result was the exhibition ‘The Invitation’ which was presented at Stadsbauhaus on 4 June.

Due to its success, the Leiden2022 Q&A has been extended and is looking for even more thought-provoking, interesting or unusual questions.

What is Planet A? A new exhibition in the Old Observatory sheds light on how we all have different perceptions of earth. In five art installations, visitors are confronted with their own beliefs and how these differ from those of others.

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

In 2023, many of our students and staff won great prizes and secured important research grants.

The lecture series 'Humanity in the Automated State' examines how AI and automated systems are transforming government and public administration and what it means to be human within these digitised institutions.

The Dies Natalis for alumni on 11 February was an online event. Almost 1,000 alumni tuned in to Bastiaan Rijpkema’s interview with Annetje Ottow, who had then been President of Leiden University’s Executive Board for all of three days. Alumni are part of her portfolio on the Executive Board.

2020 was an eventful year. You can see that in our photos: one and a half metres distance, an empty university, attending ceremonies online and working from home. The image editors have selected the twelve most eye-catching photos of the past year..

On Thursday, November 20, 2025, the Leiden Jewish Studies Network celebrated the launch of the book Still Lives: Jewish Photography in Nazi Germany (The University of Pennsylvania Press, 2025) co-authored by Ofer Ashkenazi (Jerusalem), Sarah Wobick-Segev (Hamburg), Shira Miron (Basel) and Rebekka Grossmann…

All five episodes of the first season of 'Breingeheim' are now available to listen on Spotify. The first season of the podcastseries is about the social contexts of adolescent development and how teens become resilient individuals. In every episode, a new Leiden-based behavioural scientist and an adolescent…

Professor Hester Bijl will be appointed Rector Magnificus of the Executive Board of Leiden University on 8 February 2021. She will be the first female Rector Magnificus of Leiden University. Bijl has been Vice-Rector Magnificus of the University since 1 November 2016. Carel Stolker, who has served as…

Three new initiatives will provide a more diverse view of Leiden’s academic history, literally and figuratively: a historical study on the background of students and scientists, a new book about the Academy Building, and two new sculptures of female scientists, Ewine van Dishoek, Professor of Molecular…

On 28 June 2024, Dr Kristof Gombeer spoke on State jurisdiction and the protection of people at sea at the 81st Biennial Conference of the International Law Association (ILA) in Athens, Greece.

Alumnus Ruurt Hazewinkel (90) has presented Leiden University with a special gift: a historic house on Leiden’s Rapenburg canal. He handed over the key to Rector Carel Stolker on Monday 25 January.

With Dies Natalis (Foundation Day) approaching, our year-long 444th birthday celebrations are coming to an end. We ran numerous activities, from a manhunt to an exhibition, and all our doctoral defences were given a 444 twist. A peek behind the scenes at the creatives and makers who helped make our…

Ankie Broekers-Knol, President of the Dutch Senate and Leiden alumna, opened the new Alumni House at Rapenburg 68 on 5 September. The Alumni House, next door to the Old University Library, where the University's Administration and General Services are located, is the new home of the Leiden University…