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Niko Tinbergen

Animal behaviour

Niko Tinbergen

George Uhlenbeck

Electron spins

George Ulhenbeck en Samuel Goudsmit

Willem Einthoven

Elektrocardiogram

Willem Einthoven

Heike Kamerlingh Onnes

Superconductivity

Heike Kamerlingh Onnes

Carolus Clusius

Growing tulips

Carolus Clusius

Joseph Rudolph Thorbecke

Constitution

Joseph Rudolph Thorbecke

Drukkerij Elsevier

Galileo’s Discourses

Elsevier Publishers

Pieter van Musschenbroeck

Electric condenser

Pieter van Musschenbroeck

Willebrord Snellius

Light refraction

Willebrord Snellius

Philipp Franz von Siebold

Japanese culture

Philipp Franz von Siebold

Caspar Reuvens

First Archaeology chair in the world

Caspar Reuvens

Albert Einstein

First model of the Universe according to the theory of relativity

Albert Einstein and Willem De Sitter

Jan Oort

Structure of the Milky Way

Jan Oort

Henk van de Hulst

Radio astronomy

Henk van de Hulst and Jan Oort

Simon Stevin

Decimal fractions

Simon Stevin

Hendrik Antoon Lorentz

Electron theory

Lorentz

Jon van Rood

The immune system and organ transplantation

Jon van Rood

Rogier Bertina

Factor V Leiden

Rogier Bertina and Pieter Reitsma

Johan Huizinga

The Middle Ages

Johan Huizinga

Jan Tinbergen

Econometrics

Jan Tinbergen

Herman Boerhaave

Patient-oriented medicine

Boerhaave

Pieter Zeeman

Impact of magnetic field on light

Pieter Zeeman

Willem van s Gravesande

Expansion of matter under heat and kinetic energy

Willem van ’s Gravesande

Johan Sebastiaan Ploem

Improved fluorescence microscope

Johan Sebastiaan Ploem

Adriaan Alexander Gerbrands

Visual ethnography

Gebrands

Cornelis van Vollenhoven

Adat law

Van Vollenhoven

Johannes Diderik van der Waals

Molecular thermodynamics

Van Der Waals

Jan Oort

The origin of comets

Jan Oort

Leiden Discoveries

In 2025, Leiden University will celebrate its 450th anniversary. The theme of this anniversary is 'Ahead of Its Time'. Through Leiden Discoveries, we showcase how researchers in Leiden were often far ahead of their time with their groundbreaking discoveries. We invite you to explore the route and discover the fascinating stories behind them.

About Us

Leiden Discoveries was originally an initiative launched in 2015 by Leiden University, Leiden, City of Discoveries, LURIS, and the Leiden Bio Science Park, with support from the Prins Bernhard Cultuurfonds and VSB Fonds. In 2025, the website was updated by Leiden University, Leiden & Partners, and the City of Leiden.

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Universiteit Leiden 450 jaar Leiden & Partners Gemeente Leiden

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