When after four years or more, you have finished your dissertation, it is time to prepare for the defence procedure.

When, after four years or more, you have finished your manuscript, it is time to request the Graduation Formalities to start the defence procedure.

On this page you can follow PhD defences by Leiden University researchers via live stream.

Embedding ethical legal and societal aspects for responsible military AI.

When you have finished your dissertation, it is time to prepare for the defence procedure.

When you have finished your dissertation, it is time to prepare for the defence procedure.

Eva Michaels & Monika Sus examines European Strategic Autonomy (ESA) as the EU’s response to the fragmentation of the Liberal International Order.

In this article, Dimitrova, Gürkan and Koops presents a general framework for capturing and systematicallyanalysing critical junctures and degrees of change in EU policies.

Eva Michaels & Monika Sus examine strategic autonomy in EU foreign policy, tracing evolution from the 1998 Saint-Malo Declaration to its current focus.

How can the problems in establishing a sustainable common security and defence mechanism for the EU be explained?

This open access volume surveys the state of the field to examine whether a fifth wave of deterrence theory is emerging. Bringing together insights from world-leading experts from three continents, the volume identifies the most pressing strategic challenges, frames theoretical concepts, and describes…

On 21 October, Andrea van Leerdam will defend her thesis ‘Woodcuts as Reading Guides. How Images Shaped Knowledge Transmission in Medical-Astrological Books in Dutch (1500-1550)’. To register, send an email to woodcutsasreadingguides@gmail.com.

My research project aims to analyze reasons of the European Union’s (EU) inadequacy to develop a strong Common Security and Defense Policy (CSDP) with regard to the role of main EU member states, namely Germany and the United Kingdom (UK) and find the answer of how the EU overcome the CSDP question…

It is a pleasure to announce that graphic designer Joost Grootens successfully defended his dissertation on April 23 to obtain the doctoral degree at Leiden University. Due to the coronavirus measures, it was not possible to organize a public defence.

The JASON Institute, together with the Jean Monet Centre of Excellence, Leiden University Campus The Hague, the Ministry of Foreign Affairs and Jonge Atlantici, is very pleased to invite you to the Symposium on European Defence- and Security Policy.

Landscape history, representation and identity in the Grenada islandscape

In this article, Linde Desmaele examines the dilemmas created by US burden sharing policies from the perspective of Washington's European protégés.

Context and contents of the Izcatqui manuscript in the Royal Tropical Institute, Amsterdam

A record number of 417 PhD candidates defended their theses in 2016. How many of these were cum laude? What were their propositions? The advantage of dirty nappies, for example. Read about the facts and figures on PhD defences in 2016.

From 26 until 28 January Leiden Law School hosted the regional training for lawyers as part of the EU funded project Advancing the Defence Rights of Children, organized by Fair Trials.

Stephanie Rap and Chrisje Sandelowsky-Bosman have contributed as authors to the online training manual for lawyers, that is developed as part of the training programme Advancing the Defence Rights of Children.

The ethics of ghosts, spectres, and mediums in postcolonial literature

Each year, poppies disperse seeds that grow into a new generation of flowers. Sometimes, some of the seeds postpone their germination for a few years, for example when they’re covered by a layer of sand. Only when the sand disappears, do they start to sprout. Margriet Oomen did mathematical research…

Samineh Bagheri is the first PhD candidate to defend her thesis fully remotely.

Van Vark defended her dissertation 'Separation and immersion: the changing role of the armed forces in Northwestern liberal democracies’ on 17 October 2025. The doctoral research was supervised by Maartje van der Woude and Erwin Muller.

The outbreak of coronavirus has radically changed our life and work. We have had to work, teach and conduct research from home. How has coronavirus changed your work? What do you miss most? And what is keeping you going? We asked a few colleagues.

It may not seem necessary to install special tap water stations in University buildings, but it is very useful: every tap here also means a tap in a developing country. With the the 35 tap water stations that Leiden University installs, the slum area of Madoya in Nairobi will soon have clean drinking…

Political scientist Corinna Jentzsch (Leiden University) explains why Mozambique is not (yet) a success story.

Met de voorgestelde Wet wil Defensie sneller kunnen inspelen op internationale dreigingen, door uitbreiding van kazernes en militaire oefenterreinen te realiseren. Universitair docent, Rogier Kegge, spreekt in EenVandaag over deze gereedstelling van Defensie en de rechtsbescherming voor omwonenden.

Het rapport van de Commissie Sorgdrager naar aanleiding van de Hawija-zaak, wijst uit dat Defensie niet transparant is over eigen fouten. Wim Voermans, hoogleraar Staatsrecht, bevestigt in Nieuwsuur dat ‘Defensie een patroon laat zien van verkeerd en onjuist informeren van de Tweede Kamer.’

For his PhD, historian and army major Dion Landstra researched the effectiveness of observers in peace operations in the Balkans between 1991 and 1995. What risks are acceptable for bringing about and maintaining peace? Landstra will defend his PhD on 28 September.

Distance, distance and distance again. That’s the motto of this week’s Orientation Week Leiden (OWL) for international students. And the OWL might be on a small scale, but fun is being had nonetheless.

Terwijl NAVO-landen hun defensiebudgetten fors verhogen, ontstaat ruimte voor start-ups om innovatieve technologie te leveren. De flexibiliteit en snelheid maken hen aantrekkelijk voor defensie, maar de opmars brengt ook risico’s met zich mee, waarschuwt Louisa Handel-Mazzetti, promovenda bij Lucht…

What makes peace missions succeed or fail? Which new technologies will determine the outcome of wars? In recent decades, insufficient use has been made of knowledge of modern warfare, when this is crucial to European security. This is what Frans Osinga, Professor by Special Appointment of War Studies,…

During the New Year’s reception of the Faculty of Social and Behavioural Sciences (FSW) on 12 January 2026, Sarah de Rijcke said farewell as our dean. She will become the new Rector Magnificus of Leiden University. It was not the only change of leadership announced that afternoon.

A new social media campaign launched by students from across Europe, including Frederik Behre from the Europa Institute, is aiming to motivate young Europeans to go to the polls.

Alumni and researchers met at two well-attended alumni dinners in Yogyakarta and Jakarta. The alumni reminisced about their time in Leiden and got to see their lecturers once again.