Commentators and scholars view both social media and cities as sites of fragmentation. Since both urban dwellers and social media users tend to form assortative social ties, so the reasoning goes, identity-based divisions are fortified and polarization is exacerbated in digital and urban spaces.

The study by Tahir Abbas and Liselotte Welten reveals a structural and nuanced understanding of how the question of Salafism in the Netherlands has become an increasingly discussed phenomenon and the types of threats that ought to give genuine concern to security, intelligence and policing services.

Edited by Dr. S. Arnoldussen and Prof. dr. H. Fokkens

In December 2024, Cambridge University Press published the book Regulating Competition in the Digital Network Industry by Jasper van den Boom, Assistant Professor of EU competition law at the Europa Institute of Leiden University. The book introduces a new analytical framework for understanding competition…

The Case of the Painted Plaster

This dissertation investigates the rural communities of the Cananefates in the period of 50 to 300 AD.

Dr Bela Bode receives a Feodor Lynen research fellowship for postdoctoral researchers by the Alexander von Humboldt-Foundation for development of new methods for signal enhancement in solid state NMR. He aims to create a specific analytical tool for surface studies and research on membranes and membrane…

Grotius Dialogue

Our project focuses on the analysis of decision-making processes in the European Union (EU) and explores how approaches and tools to understand decision-making found in both the Natural and the Social Sciences can be linked, knowledge between these traditions exchanged and synergies utilized. To explore…

This thesis describes the genetic and prokaryotic diversity of giant barrel sponges.

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

At the Annie Romein-Verschoor Lecture on 8 March, former Minister of Education Jet Bussemaker expressed her surprise at the commotion again raised by the theme of the economic independence of women, within and outside politics.

A recent study on reintroduced tigers in Panna Tiger Reserve in India reveals that risks from tigers increased more because of human behaviour and people's livestock husbandry practices.

For the past 25 years, we’ve been making a difference in The Hague. We proudly shared and celebrated this through the photo exhibition Researchers of the City, held in the Atrium of The Hague City Hall.

On Thursday 16 November, the Europa Institute had the honour of receiving HE Jana Reinišová, Ambassador of the Czech Republic to the Netherlands. She delivered a speech in the framework of the European Union Seminar Series, jointly organized by the master’s programme in International Relations, the…

“The union’s 60th birthday is not a moment for gifts and cake, but for reinvention around three new strategic idea. (…) The new Europe must protect, improvise and tolerate opposition”. This is what Prof. Luuk van Middelaa, Professor of Foundations and Practice of the European Union and its Institutions,…

How can we understand the drum-set – and thus drummer – as technological? How have technological developments affected change in drum-set performance and drum-set construction? Are the relationships between new technologies and the drummer symbiotic, or one way? To what extent are instruments and (reactive)…

Promotor: E.F. Smets, Co-promotor: J. Geml

This thesis examines the complexity of legislative decisions within the EU, with a specific focus on the Council of the EU.

Are you planning to conduct clinical research in the Netherlands? In this online course, you are introduced to legislation and procedures on clinical research in the Netherlands. It will help you prepare and submit your research file efficiently. The first three themes ‘The Dutch Review System’ , ‘The…

During the online panel discussion ‘Het spel en de macht’ (the game and the power) held on 9 March, six members of Leiden’s Centre for Dutch Politics and Governance (CNPB) discussed trends regarding the current and previous general elections. Will it be tense, this campaign? ‘Baudet probably still has…

KNOWMAK project aims at developing a web-based tool, which provides interactive visualisations and state-of-the-art indicators on knowledge co-creation in the European Research Area (ERA).

The Chair Democratic Representation in the Kingdom focuses on the political relations between the ‘European’ Netherlands and the six Caribbean islands in the Kingdom; so-called Kingdom Relations. Professor Wouter Veenendaal investigates the quality of democratic representation in the Kingdom, both within…

To what extent was labour-induced migration important to the functioning of the towns and cities of Roman Italy?

Mariska Jung (FGGA), Looi van Kessel (FGW), and Jasmijn Rana (FSW) have received a KIEM grant together with the Institute for Social Justice (in development) for their project 'Hope springs eternal': Protest and social movements in the Netherlands.

This lecture will be hosted on Thursday, 21 May 2026 at 6:00 pm - 7:00 pm.

This volume, featuring sixteen contributions from leading Roman historians and archaeologists, sheds new light on approaches to the economic history of urban craftsmen and traders in the Roman world, with a particular emphasis on the imperial period.

On 9 May 2018, Roy van Keulen defended his doctoral thesis 'Digital Force: Life, Liberty & Livelihood in the Information Age'. The doctoral research was supervised by Prof. dr. A. Ellian.

On Thursday 11 May 2017, Qiang Yu defended his doctoral thesis ‘Market Power and Competition Law in the Software Industry’. The supervisors of the research are Professor T.R. Ottervanger and Professor S.C.G. Van den Bogaert. A brief summary of his thesis is provided below.

Introduction

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

Are you thinking about studying Global Conflict in the Modern Era? Learn more and watch the introduction video.

Leiden Public Administration alumnus Jeffrey Jonkers negotiates in Syria with the Assad government, civilians and even with IS. The UN peace talks are due to start shortly in Geneva. Jonkers negotiates behind the scenes.

This project aims to improve transparency in the distribution of research funding in the world, with a focus on global inequalities. Through an analysis of funding flows, the project will identify inequalities and opportunities for more appropriate and fairer allocation, highlighting patterns that perpetuate…

This book sheds new light on domestic forced migration by examining the experiences of American-born slave migrants from a comparative perspective.

Where in the model of contemporary art, which can be described as a hybrid and joint undertaking between artists, institutions, curators, theory and discursivity, is the actual 'object' of art located and generated? Where and by whom and in what configuration of positions is it produced? Who or what…

The researchers examine the Council of the European Union's voting behaviour between 2010 and 2021 and the impact of different independent variables.

The photo exhibition offers a unique glimpse into the research being carried out at Leiden University in The Hague. It features eight researchers connected by one common thread: their research has a real impact on the city and the people of The Hague.

With the municipal elections in the Netherlands just around the corner, an intensive period is beginning for council adviser Kirsten van Adrichem. Behind the scenes, this political science alumnus and her colleagues work to ensure a smooth political transition.

Research report January 2020. Supported by the lectorate ‘Music, Education and Society’, research group ‘Making in Music’, Royal Conservatoire The Hague

PhD defence

This book explores how physicists, astronomers, chemists, and historians in the late nineteenth and early twentieth centuries employed ‘epistemic virtues’ such as accuracy, objectivity, and intellectual courage. In doing so, it takes the first step in providing an integrated history of the sciences…

Environmental Humanities in the New Himalayas: Symbiotic Indigeneity, Commoning, Sustainability showcases how the eco-geological creativity of the earth is integrally woven into the landforms, cultures, and cosmovisions of modern Himalayan communities.

This book provides an exploration into the historical transformations of women's interactions with state police in the Western world from 1800 to 1950.

This volume investigates how urban growth and prosperity transformed the cities of the Roman Mediterranean in the last centuries BCE and the first centuries CE, integrating debates about Roman urban space with discourse on Roman urban history.

Generations of Leiden students and academics have done archaeological research into the early medieval history of Oegstgeest. This makes this old settlement one of the best-documented sites from that era. In a new book, Leiden researchers take stock.

There is concern about the threat that nanoplastics (NPs) may pose to both wildlife and humans. This thesis explores the mechanisms of toxicity of polystyrene nanoparticles (PS-NPs) in chicken embryo.

The research reported in this thesis is concerned with the knowledge development of a small sample of experienced science teachers in the context of a broad innovation in Dutch secondary education, including the introduction of a new syllabus on Public Understanding of Science.

Consensus and harmony or balance and reciprocity?

Japan's Occupation of Java in the Second World War draws upon written and oral Japanese, Indonesian, Dutch and English-language sources to narrate the Japanese occupation of Java as a transnational intersection between two complex Asian societies, placing this narrative in a larger wartime context of…