On the 30th of September Christine Ketel successfully defended a doctoral thesis and graduated.

Between 1600 and 1800 countless manuals appeared on the subject: the improvised bass part on the harpsichord, pianoforte or organ. Musician and researcher Kathryn Cok unravels the secrets of the Dutch basso continuo accompaniment for modern-day musicians.

Former Member of Parliament Lammert van Raan (PvdD) and alumna Eva Floris gave a guest lecture on the 13th of May on the Ecocide penalisation initiative bill. During the lecture, they discussed the idea behind the bill, the objections from politicians and the business community and the advice of the…

The number of lions in Kenya is decreasing alarmingly, due partly to the encroaching cities and the development of the countryside. Together with local scientists and inhabitants, Leiden biologists are studying how this decline can be halted. ‘Lions are cleverer than we thought.’

The remains of Dutch East India Company forts are scattered throughout littoral Asia and Africa. But how important were the specific characteristics of European bastion-trace fortifications to early modern European expansion?

Promotores: H.A. Udo De Haes, P.M. Brakefield

Subproject of

What are the main factors associated with the stranding of the two seal species? What are the factors influencing the prevalence of disease in the two species? Which human-related factors influence the populations of the two seal species?

How were Spanish commanders fighting in the Low Countries between 1567 and 1577 portrayed in Spanish and Dutch narrative sources during the Eighty Years War?

In the early modern period women played a prominent role in crime. At times they even made up half of all defendants. Female criminality was a typically urban phenomenon. Why do we find so many women before the Dutch criminal courts?

The aim of the Indonesian-Dutch Literature Collective (which is allied to the Society of Dutch Literature (MNL)) is to support research into the literature of and about the Dutch Indies, from the era of the Dutch East India Company to the present. Starting in 1986, the collective has published its own…

Social and Behavioural Sciences

Scattering of light in the presence of nano-structured materials, i.e. with features in the order of the wavelength of the light or smaller, reveals details of how light interacts with matter at the nanoscale.

Promotor: Prof.dr. F.S. de Boer

A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.

On 26 April Professor of Experimental Physics Jan van Ruitenbeek was made a Knight in the Order of the Lion of the Netherlands. He received the decoration from mayor Emile Jaensch in Oegstgeest, where he lives. Van Ruitenbeek received the honour for his services to physics.

An overview of awards and prizes granted to our staff and students in 2022, as well as special appointments at Leiden University and other institutions.

How was the future United Nations Organization promoted to global publics during WW II?

Dr. Foks obtained this fellowship for the project “Can promotion of efferocytosis induce regression of atherosclerosis?”, in which she aims to identify novel targets to promote regression of atherosclerosis. This research grant allows her to initiate independent research for the next three years.

On 5 June 2018 Emile Beenakker defended her doctoral thesis ‘The implementation of international law in the national legal order: A legislative perspective’. The doctoral research was supervised by Professor W.J.M. Voermans.

Promotor: Prof.dr. T. Hankemeier, Prof.dr. J.C.T. Eijkel (Twente University)

James Shires has contributed a chapter to the proceedings of the 13th International Conference on Cyber Conflict (CyCon 2021), which gathers 20 articles from the law, technology and strategy domains.

Learning to cycle without a handbrake, saying sorry if you're late for a lecture and fathoming out the weird sounds of Dutch. Leiden's new international students get a crash course in Dutch culture during their introduction week.

On 24 April it was announced that, following his farewell, archaeologist Professor Maarten Jansen was appointed Knight of the Order of the Dutch Lion. Unfortunately, due to the corona pandemic the actual ceremony will have to wait.

LUMC professor and gynaecologist Dick Oepkes was made a Knight of the Order of the Netherlands Lion on 15 April. Mayor Henri Lenferink presented him with the medal at the end of on online symposium to mark Oepkes’ retirement.

This volume explores the nature of ellipsis, the core phenomenon that results in various types of omission in sentences.

Our cantilevers have a low intrinsic damping rate: this enables us to measure with low noise, since damping is proportionate to noise. However, when the magnet is close to the surface of a sample we want to study, we measure a much higher effective damping rate. This is caused by magnetic interaction…

Optical projection tomography (OPT) is a tomographic 3D imaging technique used for specimens in the millimetre scale.

Electron microscopy has become an extremely important techniquein a wide variety of elds.

If X is a locally compact Hausdorff space, then a representation of the complex C* algebra C_0(X) on a Hilbert space $H$ is given by a spectral measure that takes its values in the orthogonal projections on $H$.

Leiden has the most highly regarded China Studies programme in Europe. But how did this knowledge find its way specifically to Leiden? For his PhD research Koos Kuiper delved into the unique history of the start of this unique programme.

To what extent did the Netherlands grow rich from the Transatlantic slave trade? In his dissertation 'Walcherse Ketens', Gerhard de Kok looks at Vlissingen and Middelburg, the most important slave trade cities in the Netherlands during the second half of the 18th century. It turns out that, although…

On 6 April the Netherlands will vote on far-reaching cooperation with Ukraine. Referenda are exceptional in Dutch political history, according to Professor of Electoral Research Joop van Holsteijn.

The acquisition and administration of the possessions of the “Teutonic House” in Utrecht, and its dependencies, in the Middle Ages until c.1600.

On 1 February 2017 there was a hearing in the committee on European affairs of the second chamber of the Dutch Parliament on the issue of

On 11 November 2016, The Hague Law Labs and the department of Constitutional and Administrative Law, in collaboration with the Italian Association for European and Comparative Law, will organise ‘The Dutch Constitution Beyond 200: tradition and innovation in a multilevel legal order'.

As a result of the refugee crisis and the terrorist attacks in Paris and Brussels, the Royal Netherlands Marechaussee (RNM) is stepping up immigration controls in the Dutch borderlands. These measures are part of the so-called Mobile Security Monitor (in Dutch: Mobiel Toezicht Veiligheid), “Schengen…

eLaw in collaboration with the TU Delft Design for Values Institute finalized the research on “Artificial Intelligence and Ethics at the Dutch Police” by providing the whitepaper highlighting requirements for the responsible use of AI at the Police and the long-term research strategy.

The local ordering of atoms at the surface of a metallic particle determines its catalytic activity and selectivity. As energy systems of the future will be based on efficient catalytic conversion of small molecules in closed cycles, we study how structural effects of catalysts can be used to our ad…

Italian historiographers in the 16th and 17th centuries wrote remarkably often about the Dutch Revolt, better known as the Eighty Years' War (1568-1648). Their works influenced public opinion both in Italy and in the Netherlands. This is the conclusion reached by historian Cees Reijner in his dissertation.…

Luc Verheij, Professor of Constitutional and Administrative Law (Kircheiner chair) at Leiden Law School has been appointed as a member of the 'Raad van State', the Dutch Council of State. Verheij was already a State Councillor at the Advisory Division since 2011. He will continue to fulfill this role…

The Dutch Constitution is the second oldest constitution in the world after the US Constitution and it dates back to 1814. Wim Voermans, Professor of Constitutional and Administrative Law and author of the book ‘Our Constitution’ published earlier this year, advocates for a more accessible Constitut…

Northern Yemen; a highland region often in the news as the center of the Houthi regime, has a political, social, and intellectual history spanning more than a millennium. This exhibition showcases some of the findings of the Early Modern State Development in Yemen project, based at Leiden University,…

Can we find new chemical and biological sensing routes on the edge and surface of graphene to improve the potential of graphene to act as a sensor?

The main goal of this project is to answer the question: how did Dutch acquire its own, distinctive linguistic characteristics?

Professor of Sociohistorical Linguistics Ingrid Tieken-Boon van Ostade was appointed Knight in the Order of the Lion of the Netherlands on 11 September in her home city of The Hague. Deputy Mayor Bert van Alphen presented her with the decoration.

Geert Wilders’ PVV Party believes that Islam is a totalitarian ideology and not a religion, and thus Muslims are not equally entitled to the same freedom of religion or belief as other believers. This view is incompatible with liberal democracy, according to Hans-Martien ten Napel.