In the tv show 'De wereld draait door' of Tuesday 4 February, Prof. Hendrik Lenstra, together with Prof. Barry Koren, gave an explaination of the so-called 'Millenium Problems'.

What is it like to participate in the Erasmus+ grant programme as a Master's student from Ukraine? Yevhenii Radchenko did an eight-month internship at Leiden University in 2018. Soon after, he returned as a PhD candidate. 'You have little to lose, but a lot to gain.'

It may be the best tradition of them all: on the university’s birthday, its professors go to primary schools to teach a special lesson. This year, 75 professors visited 44 local schools. ‘How does stress get into your body?’

Portraits of six Leiden professors for whom 8 February 2016 was the first time that they took part in the procession of Leiden professors at the Dies Natalis.

From academic freedom to security and medical breakthroughs: during Leiden University’s 451st Dies Natalis, the speakers reflected on the role of universities in a world of social and geopolitical tensions.

Presence of LUGO

Political scientist Tim Mickler (Leiden University) receives a grant from The Dutch Research Council (NWO) for his quantitative research into post-parliamentary positions of parliamentarians. The grant is a result of the SGW Open Competition XS, with the aim of stimulating innovative scientific rese…

At the Dies Natalis Willem Otterspeer, Professor Emeritus of University History, presented the fourth and final volume of Groepsportret met Dame, his series on the history of Leiden University. De 'Strategie van de Aanpassing' covers the period 1876-1975. Otterspeer talked about his book in a podcast…

On 8 February 2016, Dr Jennifer Tour Chayes, Director of Microsoft Research in Boston and New York, will be presented with a Leiden honorary doctorate by Frank den Hollander, Professor of Probability Theory and Statistical Physics.

Agressief gedrag van gedetineerden is sterk te verlagen met een aantal aanpassingen in het dagelijkse regime in penitentiaire inrichtingen. Dit blijkt uit de evaluatie van een experiment met een alternatief detentieregime, uitgevoerd door Tilburg University en de Universiteit Leiden.

‘Big Tech heeft de democratische staat op feodale wijze aan zich onderworpen’, schrijft universitair docent Reijer Passchier in zijn nieuw verschenen boek De vloek van Big Tech. In NRC waarschuwt de docent voor de groeiende macht van techgiganten.

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.

Over 1,200 children from junior schools in Leiden and The Hague were taught by a real professor on the university's anniversary.

Course, Summer School

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.

American anthropologist Rosemary Joyce will be awarded an honorary doctorate from Leiden University on its Dies Natalis on 8 February. Joyce has delivered important new insights into the ancient Mayan cultures of Central America.

The Rijksmuseum welcomes international, independent research proposals which open new perspectives on the museum’s collection, its history and activities. The programme enables highly talented candidates to base part of their research at the Rijksmuseum, and offers access to the museum’s expertise,…

The celebration of Leiden's Dies Natalis on Monday 9 February in the Pieterskerk was extra special this year and was attended by many prominent guests. This was the kick-off of the special 88th Lustrum (five-year) celebrations in 2015.

With the official launch of the Al-Babtain Leiden University Centre for Arabic Culture, Leiden University and the AbdulAziz Saud Al-Babtain Cultural Foundation have opened the door for new opportunities of cultural and academic exchange. Have a look at last week's festivities.

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.

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…

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.

‘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 February 10, 2026, emeritus Professor Dr. Takamitsu Muraoka (1938–2026) passed away, one day after celebrating his 88th birthday. From 1991 until his retirement in 2003, he held the chair of Hebrew Language and Culture, Israelite Antiquities, and Ugaritic at Leiden University.

Laura Kamsma (31) has been coordinating the International Office (IO) of FGGA for a few months now. An introduction to the ambitious Nijmegen native, who has set herself the goal of making the International Office more visible: 'Knock on our door if you have an internationalisation issue. Now you can…

The Faculty of Humanities is proud to launch its new D&I Calendar for the academic year 2025-2026. This calendar is an effort to build awareness and cultural understanding of important religious holidays and other special observances of the diverse groups within our academic community.

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

On Sunday 18 June 2017 Melanie Fink, Postdoctoral Researcher at the Europa Institute, held a lecture on Schengen and the new European Border and Coast Guard Regulation in the framework of the ‘Open Doors’ Summer School on Migration, (Sea) Border Control and Human Rights.

Oberon Janszen, alumnus Bestuurskunde, ging na zijn studie als stagiair bij de Inspectie der Rijksfinanciën aan de slag

De AIVD gebruikt omstreden hacksoftware van de Israëlische leverancier NSO Group, meldde de Volkskrant. In 2019 zou de telefoon van topcriminineel Ridouan Taghi er mee gehackt zijn.

Verschillende bewoners in de kansarme wijk Poelenburg in Zaandam leven in angst en voelen zich geïntimideerd door de ondermijningsaanpak van de gemeente, waarbij misstanden als huisbetredingen zonder toestemming en achtervolgingen niet worden geschuwd. Fatma Çapkurt, universitair docent staats- en bestuursrecht,…

Rechtsfilosoof Timo Slootweg (ed.) publiceerde deze week: Faith in Democracy. Justice, Politics and Transcendence. Deze internationale publicatie werd mede geïnitieerd door het Leidsche, interfacultaire profileringsgebied Politieke Legitimiteit.

Wanneer de overheid niet binnen de gestelde termijn beslist, geldt een dwangsomregeling. Volgens verschillende experts werkt dit pressiemiddel niet meer. Annemarie Drahmann, universitair hoofddocent Bestuursrecht en WOO specialist, zegt in Magazine Advocatie dat dit ‘schadelijk is voor de democratische…

Door onduidelijke stikstofregels komen milieuzaken steeds vaker voor de rechter. De zaak van een Reeuwijkse varkenshouder leidt al tientallen jaren lang tot een getouwtrek tussen een milieuorganisatie, de provincie en de rechter. Rogier Kegge, universitair docent Staats- en bestuursrecht, bespreekt…

De discussie over de sluiting van illegale schietbanen van Defensie, als gevolg van de stikstofwetgeving is ingewikkeld en omvat diverse juridische aspecten. Armin Cuyvers, hoogleraar Europeesrecht, bespreekt de zaak in BNR-Nieuwsradio.

Universiteiten moeten niet verbaasd zijn dat studenten ChatGPT gebruiken, schrijven de Leidse universitair docenten Femke Klaver en Alexander de Wit in Trouw. Want studenten reageren op efficiëntie en doelmatigheid. Hun suggestie: Leid studenten op om kritisch na te denken.

Ontwerpers en onderzoekers gaan bij het verzamelen van data vaak uit van mannen als ze mensen bedoelen. Dat is onhandig en onveilig.

Uit onderzoek van het NRC blijkt dat het salaris van oud-directielid Van Hove, van het inmiddels wegens grensoverschrijdend gedrag op de werkvloer in opspraak geraakte theatergezelschap ITA, bij menigeen de wenkbrauwen doet fronsen. Gerrard Boot, hoogleraar arbeidsrecht, spreekt zich over deze salariskwestie…

De maatschappelijk onvrede over het Israël-standpunt van het Schoof-kabinet neemt in de samenleving toe. Ook op lokaal niveau vinden de discussies in de raadszalen inmiddels plaats. Boogaard spreekt in de NRC van een ‘ventielfunctie. De gemeente destilleert dingen die in de samenleving spelen en beweegt…

You can eat for charity in 2017 at Happietaria in Leiden. This pop-up restaurant, located in the New Energy building, is run by volunteers from different Christian student associations.

Reijer Passchier, hoogleraar digitalisering en de democratische rechtsstaat aan de Open Universiteit en universitair docent staatsrecht in Leiden, waarschuwt in een opiniestuk in de Volkskrant, voor de alsmaar toenemende invloed van grote technologiebedrijven ten koste van de democratische rechtssta…

De Belastingdienst weigert nog steeds cruciale documenten vrij te geven aan slachtoffers van het toeslagenschandaal, wat volgens critici tegen de wet ingaat en herstel belemmert. Hoogleraar staats- en bestuursrecht, Ymre Schuurmans noemt de praktijk in de media ‘stuitend.’

A gold carpet welcomed students, staff and curious locals into Spui Campus on Monday 2 February. The V&D department store has been transformed into a unique open knowledge centre.

Er is een nijpend cellen- en personeelstekort in Nederlandse gevangenissen. En dit is niet voor de eerste keer. Miranda Boone, hoogleraar criminologie en vergelijkende penologie, sprak met Trouw over de problematiek: ‘Het aantal gevangenen is het resultaat van beleid.’

With a single sample of water or soil, researches can analyse the DNA of everything that is living in that environment. During her research, PhD candidate Beilun Zhao discovered a way to analyse not only the kind of species, but also the age of the species in a water sample. The method showed its first…

Unemployed and work-disabled people fear the new Dutch cabinet's plans to reduce benefits. Social security law experts, including Barend Barentsen, warn in ‘NRC’ of a sharp drop in income and cast doubt on the legal viability of the plan.

At the start of the new year, we celebrate the release of a new selection of collection items into the Public Domain. This year, Leiden University Libraries (UBL) is making approximately eight hundred items freely downloadable via Digital Collections.

On Sunday 29 October the annual open day of the Old Observatory will take place. During this day, people can visit the Old Observatory for free and enjoy the historic building.

Call for Papers: Yearbook for Dutch Book History 33 (2026). Deadline 1 April 2025.