Today, 189 out of 193 officially recognised nation-states have a written constitution, and 75% of these have been ratified since 1975. How did this worldwide diffusion of constitutions come about?

Jaroslaw Kantorowicz, assistant professor at the Institute of Security and Global Affairs, isolated the reaction of the public to the potential breach of constitutional fiscal rules from the reaction of other players, such as the opposition, media and civil society organizations.

Kantorowicz & Voigt examine whether federal systems, with their multiple levels of government, lead to higher constitutional compliance

The Global Summit on Constitutionalism took place from 16 to 18 March. Wim Voermans, Gert Jan Geertjes and Rowie Stolk, from the Department of Constitutional and Administrative Law, travelled to Austin where the conference was organised by the School of Law of the University of Texas at Austin.

Constitutional and administrative law covers a broad area of law. It provides the rules with which issues in society can be solved by government authorities.

On Thursday 9 november, Reijer Passchier defended his dissertation 'Informal constitutional change'. His supervisor is Professor Wim Voermans.

On 18 september 2018, Jonathan Price defended his doctoral thesis 'The Egalitarian Constitution'. The doctoral research was supervised by Prof. dr. A.A.M. Kinneging.

Jaroslaw Kantorowicz, assistant professor at the Institute of Security and Global Affairs, is a co-author of this publication that explores the nature of the ideological bias in a constitutionally relevant decision.

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Constitutional and administrative law is a specialisation of the master’s programme Rechtsgeleerdheid (Law) at the renowned Leiden Law School of Leiden University. This programme looks closely at the interaction between national and European law.

Op 17 februari 1983 trad de geheel herziene Nederlandse Grondwet in werking. Het radioprogramma Villa VdB – gepresenteerd door Jurgen van den Berg – besteedde aandacht aan het 42-jarige jubileum van die gebeurtenis. Van den Berg ging daarover in gesprek met hoogleraar staatsrecht. Wim Voermans.

In this article, Jaroslaw Kantorowicz and his coauthors analyse how recent political changes reshaped Poland’s Constitutional Tribunal and why this transformation provides important insights into contemporary democratic backsliding in Europe.

Het boek met de titel ‘the story of constitutions’ probeert interdisciplinair te begrijpen waar de grondwet vandaan komt en waarom het juist nu in korte tijd viral is gegaan. Waarom is dit oeroude fenomeen de laatste jaren zo in populariteit toegenomen en ook nog eens in een tijd, waarin democratieën…

Migration is the talk of the town. On the whole, however, the current situation is seen as resulting from unique political upheavals. Such a-historical interpretations ignore the fact that migration is a fundamental phenomenon in human societies from the beginning and plays a crucial role in the cultural,…

Our team is committed to the study of knowledge in its broadest sense, encompassing both ideas and practices in all its historical variety. We look at what people regarded as knowledge, how they created, collected, circulated and used it, also why it mattered to them, and how all this was embedded in…

On Wednesday, 14 May 2025, Catherine O'Regan will deliver the annual Van Vollenhoven Lecture

The Leiden Greek and Roman History Team concentrates on the study of the economies, societies and cultures of the large empires of the Graeco-Roman world, starting with the empires of Alexander the Great and his successors.

Conference

On 28 June, Jakob Tobing defended the thesis 'The essence of the 1999-2002 constitutional reform in Indonesia: remaking the Negara Hukum. A socio-legal study'. The doctoral research was supervised by Jan Michiel Otto and Adriaan Bedner.

Stam defended his dissertation ‘Freedom of speech and the suppression of discrimination in the Netherlands: a constitutional-developmental approach’ on 12 November 2025. The doctoral research was supervised by Afshan Ellian and Bastiaan Rijpkema

Considering the ways in which the ‘global turn’ is changing the theory and practice of historical disciplines, Explorations in History and Globalization engages with the concept and methodology of globalization, challenging traditional divisions of space and time to offer a range of perspectives on…

Due to the fact that the Frisian lands lacked major political centers in the Middle Ages and also because most of its monasteries suffered complete destruction in the second half of the 16th century, relatively few written documents concerning medieval Frisian history have survived. To analyze them…

This seminal volume covers the entire global history of urbanization since the rise of cities in Mesopotamia in the 6th millennium BC. Leiden historians Wim Blockmans, Leonard Blussé, Luuk de Ligt and Leo Lucassen contributed survey and thematic chapters.

Lecture

Leiden’s Institute for History has an exceptionally strong expertise in premodern European history in its global context, with specialists whose interests cover virtually the whole continent. We have a strong track record in leading larger research teams and work together with colleagues across Europe…

Applications can be submitted by doctoral researchers (at least in the second year of their studies during the proppsed stay), postdocotral researchers, and senior researchers. The research should thematically align with one of the research themes or projects conducted by the academic staf of the Department…

Read on these pages all about the history of Leiden University, the oldest university in the Netherlands. The Academia Lugduna Batava was founded in 1575 and its motto is: Libertatis Praesidium ('Bastion of Freedom').

This book rovides an economic history of Portugal over the course of eight centuries, from 1143 through to 2010 and situates Portugal's economic growth within the context of European development. It also responds to fundamental questions about when, how and why the economy expanded, stagnated or co…

Are you thinking about studying Ancient History? Learn more and watch the introduction video.

As one of the most influential ideas in modern European history, democracy has fundamentally reshaped not only the landscape of governance, but also social and political thought throughout the world.

The Historia Naturalis Brasiliae Reconsidered

Leiden University was the first university to be established in the Netherlands. William of Orange gave Leiden Academia Lugduno Batava in 1575, it is said in recognition of the city’s courageous resistance against the seige by the Spanish invaders.

This thesis describes the design and development of subunit‐selective inhibitors of particular catalytically active subunits of human constitutive proteasomes and immunoproteasomes.

On 8 October, an inspiring session was held at the KOG Building. The session focused on the award-winning book entitled 'The Story of Constitutions' by Professor Wim Voermans, recently published by Cambridge University Press. The event attracted a diverse audience comprising both colleagues and students…

About the history of ProParte and its predecessors.

The key subject of the Team Economic and Social History is Inequality (at local, national and global levels). We study this from an intersectional perspective: gender, class, ethnicity or race, religion, sexuality, age, ability/disability, citizenship and legal status. We study these categories of power…

At the initiative and expense of His Majesty King Willem‑Alexander, Leiden University will conduct a study into the role of the House of Orange‑Nassau in Dutch colonial history. The project will run from 2023 to 2026.

For thousands of years, societies have fallen under the reign of a single leader, ruling as chief, king, or emperor. In this fascinating global history of medieval and early modern dynastic power, Jeroen Duindam charts the rise and fall of dynasties, the rituals of rulership, and the contested presence…

The Flentrop Organ is the third organ to have been built for the Great Auditorium in the Academy Building in Leiden.

Are you thinking about studying History of Inequality and Power? Learn more and watch the introduction video.

The Old Observatory has a rich history. On this page you will find a short version of the history that took place in the observatory.

The History Master at Leiden University has a strong international orientation.

Team History of Africa and the Americas

Are you fascinated by the past and do you like to challenge yourself? In the Dutch-taught Bachelor's programme History at Leiden University you will approach the past with a sharp and analytic view and you will learn to look at the past from a completely new perspective. study the history of the ancient…

Historical evolution law