This project is part of a broader research agenda aiming to better understand the relationships between the development of contemporary security concerns and the evolution of forms of security cooperation and crisis governance.

This dissertation advances automated negotiation by developing agents that can learn and adapt across diverse negotiation settings through three increasingly sophisticated approaches: automated algorithm configuration, portfolio-based strategy selection, and end-to-end reinforcement learning with graph…

This project, South American population history revisited: multidisciplinary perspectives on the Upper Amazon (SAPPHIRE), investigates population dynamics in western South America on the basis of traces in the geographical, genetic, archaeological, ethnological, and linguistic record.

A Persistent Revolution: History, Nationalism, and Politics in Mexico since 1968

How did free agents in the Dutch Republic react to the creation of colonial monopolies (VOC and WIC) by the States-General? This project answers this question by looking at the role individuals played in the construction of an informal global empire parallel to the institutional empire devised by the…

Roos van Oosten's research on medieval cesspits stood on the basis of an article on this subject in Quest Historie, a Dutch magazine about history.

This volume sheds light on the role played by progeny in maintaining dynasties in early modern royal courts as well as the horizontal and vertical interplay between the actors. It attempts to break through the narrative of older research that saw dynasties as a series of male rulers. Instead, these…

From 1550 onwards, a great interest in the natural world developed across Europe. This interest was not only stimulated by a growing knowledge of local flora and fauna, but also by the import of numerous exotic animal and plant species. Think, for instance, of researches and collectors like Gessner…

Politically speaking, the Frisian coastal area constitutes a special case in late medieval Europe since it was not subject to an overlord as it withstood feudalization in the 13th century. Its many sub regions, which were dominated by elites of small noblemen and freeholders, long time succeeded in…

The Impact of Mobility and Migration in the Roman Empire assembles a series of papers on key themes in the study of Roman mobility and migration.

The Rise and Decline of an Iberian Bourgeoisie is one of the first long-term studies in English of an Iberian town during the late medieval crisis. Focusing on the Catalonian city of Manresa, Jeff Fynn-Paul expertly integrates Iberian historiography with European narratives to place the city's social,…

What is the iconography of propaganda specifically as it relates to the historical development of political ideologies in modern Egypt and how was/is this propaganda disseminated among creative fields such as cinema, art, monuments, architecture, and literature?

For three millennia, carved sculptures were ubiquitous among ancient peoples in the Americas. Sculpted in stone, metal or wood, they developed into the well-known totem poles, colossal Olmec heads, royal Maya stelae and golden Inca statues.

This project uses archaeological, literary and epigraphic evidence to investigate urban development in Roman-period North Africa, compiling this in a GIS-linked database in order to analyse the development of urban settlement spatially over time.

Crime is men’s business, isn’t it? Women are responsible for 10 percent of crime in Europe. Yet, if we look at the Dutch Republic in the early modern period, we find that in the towns of Holland women played a much larger role in crime.

On the28th of September Didi van Trijp successfully defended a doctoral thesis and graduated.

A History of Modern Political Thought in East Central Europe is a two-volume project, authored by an international team of researchers, and offering the first-ever synthetic overview of the history of modern political thought in East Central Europe.

The central aim is to systematically study differences in gendered crime patterns in the records of different types of courts in various English and Dutch cities in the early modern period.

A new memorial stone on the facade of a student house in the Hugo de Grootstraat is a reminder of the dozens of Indonesian students who studied in Leiden before and during the Second World War. Some of them were active in the Resistance, which cost a number of them their lives.

The central aim is to systematically study differences in gendered crime patterns in the records of different types of courts in various Dutch cities in the early modern period.

The lecture series Humanity in the Automated State continued on 9 April 2026 at Leiden Law School with Professor of Public Law, Ida Koivisto from the University of Helsinki, an expert in the digitalisation of public administration, general administrative law, and the legitimation strategies of public…

How did learned natural historical inquiries into the underwater world develop in eighteenth-century Europe?

This project will clarify how these concepts operated in theoretical writings on performance ,this broadened conceptual framework will not only give us a clear view on how sublime effects in performance were theorized, it will also provide us a concrete apparatus to understand the cultural and political…

Fascinating images, articles of clothing and other unique objects from the past four centuries of the history of Leiden University can now be seen in the ‘Celebrating Curiosity’ exhibition in the hall of Rapenburg 70.

Early Modern Medievalisms: The Interplay between Scholarly Reflection and Artistic Production

The Uses of Justice in Global Perspective, 1600–1900 presents a new perspective on the uses of justice between 1600 and 1900 and confronts prevailing Eurocentric historiography in its examination of how people of this period made use of the law.

Particles are omnipresent in biopharmaceutical products. In protein-based therapeutics such particles are generally associated with impurities, either derived from the drug product itself (e.g. protein aggregates), or from extrinsic contaminations (e.g. cellulose fibers).

Promotor: K.J. Batenburg

Promotor: Prof.dr. T. Hankemeier, Co-Promotores: T. Reijmers, L. Coulier

The Master's programme in History at Leiden University is set to change. From September 2026, three of the five specialisations will be replaced by new subjects that are more closely aligned with the field of research and students’ interests. One of these new specialisations will also be taught entirely…

Industrial manufacturing processes, such as the production of steel or the stamping of car body parts, are complex semi-batch processes with many process steps, machine parameters and quality indicators.

How do we explain the fact that certain areas had many large cities, while other areas were studded with large numbers of small towns and yet other areas had very few urban agglomerations of any kind?

By training with virtual opponents known as computer generated forces (CGFs), trainee fighter pilots can build the experience necessary for air combat operations, at a fraction of the cost of training with real aircraft.

The studies outlined in this volume explore how connectedness continues to change Africa and how Africa continues to shape the social life of connections.

Bringing together the most current research on the relationship between crime and gender in the West between 1600 and 1914, this authoritative volume places female criminality within its everyday context.