On 8 February 2023 Leiden Unversity celebrates its 448th foundation day.

This critical edition covers the first two parts of De secundis intentionibus by Hervaeus Natalis (14th century).

On 8 February 2024 Leiden University celebrated its 449th anniversary.

SAVE THE DATE | University ceremony

Leiden University celebrated its 445th foundation day on 7 February 2020.

Leiden University celebrated its 442nd foundation day on 8 February 2017.

On 8 February 2022 Leiden University celebrated its 447th anniversary.

Leiden University celebrated its 443th foundation day on 8 February 2018.

On 8 February 2021 Leiden University celebrated its 446th anniversary.

Leiden University celebrated its 444th foundation day on 8 February 2019.

Pieterskerk and Leiden University are closely connected. The University was founded in Pieterskerk and to this day we celebrate that at the University’s annual Dies Natalis. Much has to be done to get the church ready for this special day. A photo series behind the scenes.

Martijn Junte defended his thesis on 21 September 2017

PhD defence

On the 442nd anniversary of the foundation of Leiden University, and at the start of the Leiden Asia Year, lawyer Jan Michiel Otto, an expert in the field of law in developing countries, delivered the first Dies lecture. He compared demagogues in Asia who call upon Muslims to turn against their governments…

On February 8 the 443rd dies natalis will take place in the Pieterskerk in Leiden.

‘Collaboration is increasingly important,’ Rector Magnificus Carel Stolker said at the 445th Dies Natalis of Leiden University on 7 February. But, as he heard from a number of Leiden researchers, this is contingent upon a firm disciplinary basis. A novelty of this year’s celebration was a joint dies…

Which plants are depicted, described or collected in these century-old objects? Who made these objects, where and for what purpose? What is their scientific and societal relevance today?

Universities cannot survive in this highly competitive world without collaboration. And the ultimate aim is to make the world a safer and more sustainable place. This was Rector Carel Stolker’s message during the 441st Dies Natalis.

‘We could share our knowledge more with others and apply it more widely,’ said Annetje Ottow, President of the Executive Board, while presenting the new Strategic Plan on the University’s 447th Dies Natalis. The new Strategic Plan therefore focuses on innovating and connecting, among disciplines and…

The importance of science communication and cross-boundary collaboration, and the ‘mantra’ of diminishing social cohesion in society: these all came up at Leiden University’s 448th Dies Natalis. A panel discussion including Leiden’s mayor Lenferink, music and two honorary doctorates completed the special…

Leiden University College The Hague turns 7 today (29 September 2017). Lieke Schreel, educational director of LUC has been with the college from the start. She shares her thoughts on another year and birthday of the College.

On 8 February, GTGC's Chair prof.dr. Jan Aart Scholte, gave a speech during the high-level dinner of the university's 449th Dies Natalis. The speech was themed around 'including the other' in research and focussed on the value of inviting and engaging with perspectives different than your own.

On 17 October 2018, Thomas Sanders defended his doctoral thesis 'Invordering door de overheid: de invordering van geldschulden uit herstelsancties onder de Awb'. The doctoral research was supervised by Prof. mr. T. Barkhuysen and Prof. mr. M.W. Scheltema.

‘It truly is a plan by and for us all,’ said Annetje Ottow, President of the Executive Board, at the Dies Natalis celebration on 8 February. Leiden Law School was also actively involved developing in the strategic plan.

How has evolution shaped our curiosity? And how does that curiosity ensure that we now have the technological ability to discover whether we are alone in the universe? This was all covered during the celebration of Leiden University’s 449th Dies Natalis.

On September 29th LUC celebrated its 6th birthday. Lieke Schreel, the Educational Director of LUC has been involved with the programme from the start. She reflects on the growth and the development of LUC in those six years.

‘Collaboration is increasingly important,’ Rector Magnificus Carel Stolker said at the 445th Dies Natalis of Leiden University on 7 February. But, as he heard from a number of Leiden researchers, this is contingent upon a firm disciplinary basis. A novelty of this year’s celebration was a joint dies…

On the occasion of the 440th DIES NATALIS, celebrated on Monday 9 February, Leiden University proudly awarded an Honorary Doctorate to William Christie, renowned harpsichordist, conductor, musicologist and teacher, and the foremost pioneer in the renewed appreciation of Baroque music in France, notably…

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

Noah Millman defended his thesis on 26 May 2015

Historian Frank Dikötter will receive an honorary doctorate from Leiden University for his work on the history of the Chinese Republican period and the People's Republic of China under Mao. He will be awarded the honorary degree during the university's Dies Natalis celebrations on 8 February 2017.

Michiel Pronk defended his thesis on 30 March 2016

What we did this year? Well, we ran for charity, moved a 2,000 kilo electron microscope and ate poffertjes in the garden. Oh yes, and together mapped out a strategy for the next five years. Warm up the fingers and get ready to scroll through the year of Leiden Science in 2023.

The student weekly diary of Archaeology/Egyptology students, 2023.

No procession of professors, just a handful of people in the church and snowdrifts outside Leiden’s Pieterskerk: 8 February 2021 was no ordinary Dies Natalis. Carel Stolker transferred the rectorate to Hester Bijl, and Annetje Ottow became the new President of the Executive Board. With an honorary doctorate…

You will find the Individual and team results of the Leiden Science Run below.

Every year around 8 February, Leiden University, the oldest university in the Netherlands, is celebrating its birthday. Why does the King still receive a telegram on the day of the Dies Natalis? 4 questions on the origins of Leiden University and its traditions for celebrating its foundation day.

University ceremony

Who is the most inspiring teacher? Who is our most outstanding bachelor student? And which PhD candidate wrote the best thesis? In other words: Who are the winners of the 2023 Faculty Awards?

This is the official website of the Co-Align 2023 Conference

Registration for the Co-Align 2023 conference is open!

This is the homepage of the Co-Align Conference 2023. We are excited to welcome you to Leiden!

Watch the recordings of the policy roundtables here.

Last week, the Old Observatory Leiden concluded its participation in Stage 1 of the DOORS Incubation Programme. Our team has spent the last three months learning about how to successfully implement digital practices into their work to improve our audience engagement. The workshops introduced important…