An international team led by Leiden astronomers has discovered why the two stars of binary star DI Herculis rotate so strangely around one another, which once even proved problematic for Einstein's theory of relativity. Their findings were published in Nature.

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

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

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

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.

Edegar da Conceição Savio defended his thesis on 28 January 2016

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.

The Disticha Catonis by Catenaccio of Anagni. A text in vernacular from Latium (late 13th - early 14th century)

How do people experience ‘inclusion’ in sports? How can experiential expertise enhance policies in sport and inclusion? This research internship at The Mulier Institute enables a student to investigate these issues from a qualitative research perspective.

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…

Selamat datang di Universitas Leiden. Kami sangat bergembira atas minat Anda untuk mengambil PhD di universitas kami.

Situasi dunia sedang mengkhawatirkan. Di tengah terpaan berita-berita kurang baik, Anda menerima sebuah email yang selama ini dinantikan. Di pembuka email itu tertulis: "Selamat, Anda diterima di Universitas Leiden!"

‘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…

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.

Lugduno Batava Praesidium Libertatis adalah slogan Universitas Leiden dalam bahasa Latin yang kurang lebih bermakna "Leiden adalah bastion kebebasan". Universitas yang didirikan pada tahun 1575 ini adalah "tropi" yang diberikan oleh Willem van Oranye karena jasa masyarakat Leiden membebaskan kota tersebut…

ACPA alumnus Kevin Toksöz Fairbairn has just published a new book at Punctum Books - dis/cord: Thinking Sound through Agential Realism.

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.

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.

This weekend, the very sad news reached us that former employee Peter Hovenkamp died during an excursion in Malaysia. He was surprised by a flash flood in a cave in Gunung Mulu National Park.

As part of his PhD trajectory, Johannes Boer (PhD candidate at the ACPA), created a music theatre production La Tragedia di Claudio M. .

‘Make more room for nature on farmland and you'll be surprised at the result.' This was the advice from Geert de Snoo in his Dies lecture.

‘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.

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.

‘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 44th anniversary of Maastricht University, organisational psychologist Carsten de Dreu has transferred the dies lecture: 'On the Psychology and Economics of Leading Groups’. Watch Youtube for the lecture of De Dreu, winner of the Spinoza Prize in 2018.

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…

Professor Maartje van der Woude of the Van Vollenhoven Institute delivered a special Dies Lecture in San Francisco on Wednesday 12 February.

The Dies Natalis for alumni was held on Saturday 10 February, organised by the Leiden University Fund (LUF) together with the University. Almost 500 alumni came together in the Kamerlingh Onnes building to celebrate the 443rd anniversary of the foundation of their alma mater.

Her specialist field is molecular astrophysics, and she is the most quoted scholar in her field. In this, the year of astronomy, she is the ideal person to give the Dies lecture at the university with the world's oldest astronomy institute; it goes without saying that the lecture will be on the newest…

Conference, Ceremony

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.

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…

Festival, University ceremony

Alumni Event, University ceremony

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.