The democratic legal order can only function optimally if there is sufficient trust between citizens and government. Citizens must be able to trust that rules and procedures are observed and that legal protection is guaranteed for everyone at all times and everywhere. This trust has been seriously damaged…

Hans Slabbekoorn is specialised in animal sounds. On 1 July, he was appointed professor of Acoustic ecology and behaviour. A great honour, according to the new professor. ‘This job never gets boring, whether I am investigating the urban jungle or marine noise.’

Study support

Study support

Study support

Uniquely within the Netherlands, Leiden University Library also collects objects to document the technical development of photography. Hundreds of historical cameras are part of the colletion, as well as darkroom and finishing equipment (light meters, developing trays, color filters, drying racks, etcetera),…

Our collections contain many materials that are old, fragile, light-sensitive, maltreated in the past or much used and therefore tattered. Other items may be hundreds of years old and still be in sound condition. We aim to have all collections available as much as possible, while we also preserve them…

Overview of databases, reference works and websites for research in Mathematics

Geographic information systems (GIS) are computer-based systems for editing and displaying spatial data. GIS tools allow users to create interactive queries, analyze spatial relationships, patterns or trends and visualize the output of all these efforts.

Leiden is a knowledge hub, unique in its kind in the Netherlands, for academics, professionals, students and all other people who are specialized or interested in photography. The city and university offer:

We hope library users are happy using Leiden University Libraries' services. If this is not the case, please let us know. We love to receive suggestions, comments and ideas on how we can improve services, and try to learn from complaints. Choose one of the following options to submit your feedback:…

Overview of databases, reference works and websites for research in Physics.

The main focus of the Islamic World Special Collections is on the Middle East and North Africa, with smaller holdings from Indonesia, the Indian Subcontinent and Central Asia as far as Xinjiang, China.

Scholarly Publications is a sustainable archive for Leiden University’s publications, which researchers themselves can make Open Access by means of an upload via LUCRIS.

The Southeast Asian Special Collections contain text and audiovisual materials pertaining to the languages, histories, philosophies, religions, literatures, and (material) art of the region. The focus lies on the Malay world, in particular on the Nederlands-Indies/Indonesia. Apart from books and periodicals…

Overview of databases and websites for research in Astronomy

As a Friend, you contribute to the acquisition, digitisation and restoration of important objects.

In this FAQ we try to answer a selection of the most important questions on research data management that we compiled over the last 5 years.

Text and Data Mining (TDM) is increasingly applied in various academic disciplines to extract useful information from unstructured textual data using computational methods.

According to a rough estimate the western manuscripts collections and (private) archives contain some 500,000 letters, of which over 300,000 are catalogued. The letters kept in the University archives are not catalogued; the same holds for most letters kept in the oriental collections. They can be found…

Leiden University Libraries (UBL) owns over 5 million paper materials. Loanable items can be picked up and returned at the UBL library location of your choice.

The Library of Leiden University holds c. 550 manuscripts and an extensive collection of rare printed books in Hebrew, Aramaic, Syriac, the languages of Ethiopia, South Arabic, Coptic and Armenian, as well as a collection of rare books on the Jewish World.

How do you pick a topic and research question for your thesis or paper? And is your schedule realistic? Check out the tutorials and resources below.

A number of tools and services are available to help you keep up to date with the latest developments in your subject field.

Our banking, DigiD and sensitive medical data: what if our entire digital infrastructure can no longer be trusted? Jelle Don has this question permanently in mind as he goes about his research. And that is no bad thing because without new digital security measures, our society will be extremely vuln…

The archives created by Leiden University and the private archives of Leiden professors are an invaluable source for the history of the university and its functioning. The main sources have been edited (nearly always in Dutch). In addition, several studies have been published, describing the development…

A collection consists of items and parts that have been collected by one or more individuals or institutions not responsible for their formation. An archive has been created by one or more individuals or institutions.

In 2022, Leiden was European City of Science. During this year, Leiden presented a public programme brimming with science, knowledge, arts, and skills for anyone with a curious mind. Leiden University Libraries (UBL) organised an extensive programme of activities on the theme of Leiden European City…

Practical information on submitting your dissertation

The airspace had almost closed last year as Leiden students and staff rushed to leave the Netherlands Institute Morocco (NIMAR). How is this Leiden institute in Rabat doing over a year later? ‘Luckily we’d done a crisis exercise a few months before. Everyone managed leave the country in time.’

Love. It makes people do the strangest things and at the same time it is a primary necessity of life. Over the centuries, writers and poets have filled up entire libraries with books on real and fictional relationships, and contemporary writers still like to delve into the complex, dramatic and at times…

Rembrandt Year is concluding with a major exhibition at Museum De Lakenhal. There are still numerous other activities such as lectures, the University Rembrandt Route and the screening of a critical documentary.

‘Raising awareness of the disorder is crucial since borderline personality disorder (BPD) still faces considerable stigma ’, says Anne Krause-Utz (Clinical Psychology) . Together with an international team of excellent scientists, Krause-Utz provides an update of current knowledge about this disorder,…

They might not have had Twitter, but they did have brochures (pamphlets), the Roman Catholics and ‘modern’ Protestants between 1840 and 1870. In these, they launched a passionate attack on each other’s ideas. Ineke Smit has catalogued the brochures from the collection of the University Library and outlined…

Library, Research

Fungi germinating in the lungs of patients. Doesn’t sound too nice, does it? Luckily, humans can deal with this normally, and we are able to clear the infection before anything comes to harm. However, in people with health issues, Aspergillosis can cause a lot of damage, especially if the fungus becomes…

The Epic of Gilgamesh was a lifelong inspiration to artist Harry van Kruiningen. This tale from Mesopotamia about the adventures of Gilgamesh, the legendary king of Uruk, and his friend Enkidu is one of the oldest surviving epics in world literature. Despite its almost 4,000 year age, it still captures…

The Dutch universities are conducting a joint campaign to promote open access: free access to academic and scientific publications. Many Leiden researchers support open access. Given that it involves a shift in the financing from the reader to the author, they point out the need for effective agreements…

Last month, the UBL announced that it will deselect an extensive collection of foreign dissertations. We are happy to report now that The Internet Archive will be taking over this collection.

Use LUCRIS and Scholarly Publications to share, promote, and store your publications.

Read all about the most important functionalities of Zotero.

In his leaving interview, Martijn Ridderbos doesn’t have to think long when asked what he is most proud of. ‘Bringing people together; creating things together. Reducing the gap between researchers and the staff who support them because the latter are essential. We’ve achieved that and the seeds have…

From time to time, manuscripts that have remained hidden for centuries turn up in library collections and archives. In the archives of the 17th-century Bibliotheca Thysiana at the Rapenburg in Leiden, kept in the Leiden University Library, Rotterdam researcher Erik-Jan Bos discovered a hitherto unknown…

A flamboyant politician, a divisive figure in the Dutch political landscape and a 'man of the people' who presented himself as an unconventional minister. Exactly twenty years ago today, the Netherlands was shocked to its core by the political murder of Pim Fortuyn. Who was Pim Fortuyn? What were his…

How does a Leiden alumnus end up working at the New York Metropolitan Museum of Art (The Met)? In the case of Daniëlle Kisluk-Grosheide, it was partly down to chance, luck, fate. But that was preceded by a unique degree in decorative arts in Leiden.