This thesis describes a study from both a theoreticaL and an experimental point of view.

This dissertation investigates A'-dependencies in Standard German, Zurich German and Dutch where the dislocated constituent is indirectly, i.e. not transformationally, related to the position where it is interpreted. The analysis is carried out within the Principles & Parameters framework.

Promotores: F.H.J. Redig, W.T.F. den Hollander

This dissertation focuses on a new field of artistic research in which a visual artist takes on the role of researcher. The main research question is whether performance art integrated in an ecumenical service, combined with artistic directions from the artist, can enhance the religious experience of…

Tero Alstola defended his thesis on 21 December 2017

This PhD project investigates the forms, functions, meanings, and socio-cultural values embedded in Palenda, in order to understand how it reflects and shapes the worldview of the Muna people (Mieno Wuna) through metaphor.

Solar energy harnessed by plants and algae has great potential to be converted into biofuels for future generations.

On the 16th of June Patrtick Harrison successfully defended a doctoral thesis and graduated.

On 10 June 2021, Merinda Stewart defended her thesis 'Freedom of Overflight: A Study of Coastal State Jurisdiction in International Airspace'. The doctoral research was supervised by Prof. P.M.J. Mendes de Leon en Prof. J.J. Rijpma.

How do Humanitarian Response Organizations (HROs) and Virtual & Technical Communities (V&TCs) collaboratively govern disaster sensemaking processes, and what challenges shape the effectiveness of these collaborations between 2010 and 2016?

β-Lactamases are enzymes that can break down β-lactam substrates, such as antibiotics, preventing the use of these antibiotics for the treatment of various infectious diseases. However, some compounds, β-lactamase inhibitors, can block these enzymes allowing for possible treatments using a combination…

This dissertation defends the existence of a type of movement that has so far been considered not to be possible, namely, movement of a bare head to a specifier position over arbitrarily long distances.

What is students’ engagement in problem-based learning (PBL) and case-based learning (CBL) in teacher certification programs?

On Wednesday 11 June 2025 Steffie van Gompel successfully defended a doctoral thesis and graduated.

Like a mixture of oil and water, lipid membranes separate into two liquid phases.

This thesis is a sample-based typological study of formal and semantic patterns in terms for a selection of referring (

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.

This study endeavors to reconstruct Plato's theory of change and motion. The diverse perspectives of pre-Socratic philosophers regarding change and motion provide the context for Plato’s exploration of his theory.

Whilst government’s ability to design ‘context-specific’ regional innovation policy is generally assumed to depend on the region’s decision-making power, the aim of this study is to investigate how regional government matters. In order to open up the black box of policy design, the study develops a…

Do citizens care for interest representation? A study on citizens’ perceptions and feelings towards the representative potential of civil society

Do offshore windfarms affect the local biodiversity of the pelagic fish community and are fish deterred or attracted by sounds?

This dissertations studies state-society relations in 1930s Turkey, focusing on the anti-veiling campaigns in the mid-1930s and aiming to understand the ways in which the Kemalist policies were received, interpreted, negotiated, compromised and/or resisted by various actors in the provinces.

PURPOSE: The aim of the study was to develop a cheap and fast method to produce hollow microneedles and an applicator for injecting vaccines into the skin at a pre-defined depth and test the applicability of the system for dermal polio vaccination.

PhD defence

Occupational health in the Emergency Department

A discount on textbooks is always welcome. But for these students joining a study association has meant much more than that alone.

How has interreligious encounter in Ogbómòsó created multiple religious belongings and identities among individuals and groups?

Clustered Neighbourhood Settlements of the Central Anatolian Neolithic ca. 8500-5500 Cal. BC

This partnership is based on an academic collaboration between the Leiden University Medical Center and the Institute of Public Administration, research has been conducted on leadership in the domain of health care in times of crisis.

Chaider Bamualim defended his thesis on 9 September 2015

Stylianos Irakleous defended his thesis on 6 February 2020

On the 6th of January, Kefan Bao successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Kefan on this achievement!

This dissertation is a study of the view of the Neoplatonist Proclus (Athens, 411-485) on to what extent and how the changing and unreliable world of sense perception can itself be an object of scientific knowledge.

Making choices is part of life. You make larger or smaller choices in everything you do, and you progress from one choice/decision to the next. All decision-making processes involve three aspects: making a choice, experiencing that choice and reflecting on it.

At Leiden University you can choose from 16 English-taught bachelor’s and 250 English-taught master’s programmes. We enjoy an excellent worldwide reputation accumulated over more than four centuries. Today we’re consistently highly placed in major rankings, such as The Times Higher Education, QS and…

On 27 June 2019, Barry Bussey defended his thesis 'The Legal Revolution Against the Accommodation of Religion: The Secular Age v. The Sexular Age'. The doctoral research was supervised by Prof. dr. P.B. Cliteur.

If you are going to study, it is not only important that you like the study programme. It’s also good to already have an idea of which professions you might enjoy.

Leiden Law School offers an extensive range of English-taught law courses at undergraduate level. These are open to both Dutch and international students alike, giving them a truly international flavour.

Students in Leiden are entitled to good teaching and good supervision. For their part, there are some conditions they have to meet to ensure that they complete their studies within the time allotted.

The Classics and Ancient Civilizations (Research) programme in Egyptology offers many extracurricular opportunities to enrich your study experience.

Read all the study choice tips and take the tests to get to know more about yourself. These tests can give you insight into your interests, competences, values and personality. That can help you make your study choice.

Choosing a study programme at a research university or university of applied sciences can be tricky. There are so many options! Where should you begin? We will guide you step by step through the study choice process, to the study programme that’s right for you.

The Classics and Ancient Civilizations (Research) programme offers many extracurricular opportunities to enrich your study experience.

The Classics and Ancient Civilizations (Research) programme in Assyriology offers many extracurricular opportunities to enrich your study experience.

Below you can find information about the research projects on public leadership of the public management research group at the Institute of Public Administration.

The Faculty of Science has multiple study associations, which organise both study-related and social activities for students.

Is the current existing legal framework on compulsory and voluntary care - for vulnerable young adults (between the ages of 18 to 23) - in need of revision? And if so, what kind of amendments would be advisable?