The Université libre de Bruxelles (French, pronounced [ynivɛʁsite libʁ də bʁysɛl]; lit. Free University of Brussels; abbreviated ULB) is a French-speaking research university in Brussels, Belgium. It has three campuses: the Solbosch campus (in the City of Brussels and Ixelles), the Plaine campus (in Ixelles) and the Erasmus campus (in Anderlecht).

The Université libre de Bruxelles was formed in 1969 by the splitting of the Free University of Brussels, which was founded in 1834 by the lawyer and liberal politician Pierre-Théodore Verhaegen. The founder aimed to establish a university independent from state and church, where academic freedom would prevail. This is today still reflected in the university's motto Scientia vincere tenebras, or "Conquering darkness by science".

One of the leading Belgian universities open to Europe and the world, the ULB now has about 24,200 students, 33% of whom come from abroad, and an equally cosmopolitan staff.

Brussels has two universities whose names mean Free University of Brussels in English: the French-speaking Université libre de Bruxelles (ULB) and the Dutch-speaking Vrije Universiteit Brussel (VUB). Neither uses the English translation, since it is ambiguous.

The history of the Université libre de Bruxelles is closely linked with that of Belgium itself. When the Belgian State was formed in 1830 by nine breakaway provinces from the Kingdom of the Netherlands, three state universities existed in the cities of Ghent, Leuven and Liège, but none in the new capital, Brussels. Since the government was reluctant to fund another state university, a group of leading intellectuals in the fields of arts, science, and education — amongst whom the study prefect of the Royal Athenaeum of Brussels, Auguste Baron, as well as the astronomer and mathematician Adolphe Quetelet — planned to create a private university, which was permitted under the Belgian Constitution.

In 1834, the Belgian episcopate decided to establish a Catholic university in Mechelen with the aim of regaining the influence of the Catholic Church on the academic scene in Belgium, and the government had the intent to close the university at Leuven and donate the buildings to the Catholic institution. The country's liberals strongly opposed to this decision, and furthered their ideas for a university in Brussels as a counterbalance to the Catholic institution. At the same time, Auguste Baron had just become a member of the freemasonic lodge Les Amis Philantropes. Baron was able to convince Pierre-Théodore Verhaegen, the president of the lodge, to support the idea for a new university. On 24 June 1834, Verhaegen presented his plan to establish a free university.

After sufficient funding was collected among advocates, the Université libre de Belgique ("Free University of Belgium") was inaugurated on 20 November 1834, in the Gothic Room of Brussels Town Hall. The date of its establishment is still commemorated annually, by students of its successor institutions, as a holiday called Saint Verhaegen (often shortened to St V) for Pierre-Théodore Verhaegen. In 1836, the university was renamed the Université libre de Bruxelles ("Free University of Brussels").

After its establishment, the Free University faced difficult times, since it received no subsidies or grants from the government; yearly fundraising events and tuition fees provided the only financial means. Verhaegen, who became a professor and later head of the new university, gave it a mission statement which he summarised in a speech to King Leopold I: "the principle of free inquiry and academic freedom uninfluenced by any political or religious authority." In 1858, the Catholic Church established the Saint-Louis Institute in the city, which subsequently expanded into a university in its own right.

The Free University grew significantly over the following decades. In 1842, it moved to the Granvelle Palace, which it occupied until 1928. It expanded the number of subjects taught and, in 1880, became one of the first institutions in Belgium to allow female students to study in some faculties. In 1893, it received large grants from Ernest and Alfred Solvay and Raoul Warocqué to open new faculties in the city. A disagreement over an invite to the anarchist geographer Élisée Reclus to speak at the university in 1893 led to some of the liberal and socialist faculty splitting away from the Free University to form the New University of Brussels (Université nouvelle de Bruxelles) in 1894. The institution failed to displace the Free University, however, and closed definitively in 1919.

In 1900, the Free University's football team won the bronze medal at the Summer Olympics. After Racing Club de Bruxelles declined to participate, a student selection with players from the university was sent by the Federation. The team was enforced with a few non-students. The Institute of Sociology was founded in 1902, then in 1904 the Solvay School of Commerce, which would later become the Solvay Brussels School of Economics and Management. In 1911, the university obtained its legal personality under the name Université libre de Bruxelles - Vrije Hogeschool te Brussel.

The German occupation during World War I led to the suspension of classes for four years in 1914–1918. In the aftermath of the war, the Free University moved its principle activities to the Solbosch in the southern suburb of Ixelles and a purpose-built university campus was created, funded by the Belgian American Educational Foundation.

The university was again closed by the German occupiers during World War II on 25 November 1941. Students from the university were involved in the Belgian Resistance, notably establishing the sabotage-orientated network Groupe G.

Courses at the Free University were taught exclusively in French until the early 20th century. After Belgian independence, French was widely accepted as the language of the bourgeoisie and upper classes and was the only medium in law and academia. As the Flemish Movement gained prominence among the Dutch-speaking majority in Flanders over the late 19th century, the lack of provision for Dutch speakers in higher education became a major source of political contention. Ghent University became the first institution in 1930 to teach exclusively in Dutch.

Some courses at the Free University's Faculty of Law began being taught in both French and Dutch as early as 1935. Nevertheless, it was not until 1963 that all faculties offered their courses in both languages. Tensions between French- and Dutch-speaking students in the country came to a head in 1968 when the Catholic University of Leuven split along linguistic lines, becoming the first of several national institutions to do so.

On 1 October 1969, the French and Dutch entities of the Free University separated into two distinct sister universities. This splitting became official with the act of 28 May 1970, of the Belgian Parliament, by which the French-speaking Université libre de Bruxelles (ULB) and the Dutch-speaking Vrije Universiteit Brussel (VUB) officially became two separate legal, administrative and scientific entities.

The ULB comprises three main campuses: the Solbosch campus, on the territories of the City of Brussels and Ixelles municipalities in the Brussels-Capital Region, the Plaine campus in Ixelles, and the Erasmus campus in Anderlecht, beside the Erasmus Hospital.

The main and largest campus of the university is the Solbosch, which hosts the administration and general services of the university. It also includes most of the faculties of the humanities, the École polytechnique, the large library of social sciences, and among the museums of the ULB, the Museum of Zoology and Anthropology, the Allende exhibition room and the Michel de Ghelderode Museum-Library.

The Plaine campus hosts the Faculty of Science and the Faculty of Pharmacy. There are also the Experimentariums of physics and chemistry, the Museum of Medicinal Plants and Pharmacy and student housing. This site is served by Delta station.

The Erasmus campus houses the Erasmus Hospital and the Pôle Santé, the Faculty of Medicine, the School of Public Health and the Faculty of Motor Sciences. There is also the School of Nursing (with the Haute école libre de Bruxelles – Ilya Prigogine), the Museum of Medicine and the Museum of Human Anatomy and Embryology. This site is served by Erasme/Erasmus metro station.

The university also has buildings and activities in the Brussels municipality of Auderghem, and outside of Brussels, in Charleroi on the Aéropole Science Park and Nivelles.

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  The main building on the Solbosch campus, located in the City of Brussels close to Ixelles
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  Entrance of the Paul-Émile Janson Auditorium on the Solbosch campus
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  The Museum of Medicine on the Erasmus campus in Anderlecht

• Institute for European Studies
• Interfacultary School of Bio-Engineering
• School of Public Health
• High Institute of Physical Education and Kinesiotherapy
• Institute of Work Sciences
• Institute of Statistics and Operational Research
• Institute for Astronomy and Astrophysics
• Solvay Brussels School of Economics and Management
• Faculty of Sciences

University of California, Berkeley, University of Oxford, University of Cambridge, Université de Montréal, Waseda University, Université Pierre et Marie Curie - Paris VI, BeiHang University, Universidade de São Paulo, Université de Lausanne, Université de Genève, University Ouaga I Pr. Joseph Ki-Zerbo, University of Lubumbashi

Faculty or Institute	Bachelor's degrees	Master's degrees	Complementary master's degrees
Faculty of Architecture	Architecture	Architecture
Faculty of Philosophy and Letters	Ancient Languages and Literature: 1. Classic orientation; 2. Oriental orientation	Ancient Languages and Literature: 1. Classic orientation (1 or 2 years) 2. Oriental orientation (1 or 2 years)	African Languages and Cultures
			Pedagogy in Higher Education
			Language Sciences
	Art History and Archaeology	Art History and Archaeology (1 or 2 years)
	Art History and Archaeology: Musicology	Art History and Archaeology: Musicology (1 or 2 years)
	French and Roman Languages and Literature	Cultural Management
	History	Ethics
	Information and Communication	French and Roman Languages and Literature (1 or 2 years)
	Modern Languages and Literature	French and Roman Languages and Literature: French Foreign Language
	Modern Languages and Literature: 1. General orientation 2. Germanic orientation 3. Oriental orientation 4. Slavic orientation	History (1 or 2 years)
	Philosophy	Information and Communication (1 or 2 years)
	Religious and Secular Studies	Information and Communication Sciences and Technologies
		Linguistics
		Modern Languages and Literature (1 or 2 years)
		Modern Languages and Literature: 1. Arab orientation 2. Germanic orientation (1 or 2 years) 3. Oriental orientation (1 or 2 years) 4. Slavic orientation (1 or 2 years)
		Multilingual Communication
		Performing Arts
		Philosophy (1 or 2 years)
		Religious and Secular Studies
Faculty of Law and Criminological Science	Law	Criminology	Economic Law
		Law	International Law
			Notaries
			Public and Administrative Law
			Social Law
			Tax Law
Faculty of Psychological Science, and of Education	Psychology and Educational Sciences	Educational Sciences	Pedagogy in Higher Education
	Psychology and Educational Sciences: Speech Therapy	Psychology	Psychoanalytic Theories
		Speech Therapy	Risk Management and Well-being at Work
Faculty of Sciences (recently absorbed the Institute of Environment Gestion (IGEAT))	Biology	Actuarial Science	Nanotechnology
	Chemistry	Biochemistry and Molecular and Cellular Biology
	Computer Sciences	Bioengineering: Agricultural Sciences
	Engineering: Bioengineering	Bioengineering: Chemistry and Bio-industries
	Geography	Bioengineering: Environmental Sciences and Technologies
	Geology	Bioinformatics and Modeling
	Mathematics	Biology (1 year)
	Physics	Chemistry (1 or 2 years)
	Sciences (Polyvalent first year)	Computer Sciences (1 or 2 years)
		Environmental Sciences and Management (1 or 2 years)
		Geography (1 or 2 years)
		Geology (1 or 2 years)
		Mathematics (1 or 2 years)
		Organismal Biology and Ecology
		Physics (1 or 2 years)
		Statistics
		Tourism Sciences and Management (1 or 2 years)
Faculty of Applied Sciences/Polytechnic School	Engineering: Bioengineering	Bioengineering: Agricultural Sciences	Conservation and Restoration of Immovable Cultural Heritage
	Engineering: Civil	Bioengineering: Chemistry and Bio-industries	Nanotechnology
	Engineering: Civil Architect	Bioengineering: Environmental Sciences and Technologies	Nuclear Engineering
		Civil Engineering: Architectural	Transportation Management
		Civil Engineering: Biomedical	Urban and Regional Planning
		Civil Engineering: Chemistry and Material Science
		Civil Engineering: Computer
		Civil Engineering: Constructions
		Civil Engineering: Electrical
		Civil Engineering: Electro-mechanical
		Civil Engineering: Mechanical
		Civil Engineering: Physicist
Faculty of Medicine	Biomedical Sciences	Biomedical Sciences
	Dentistry	Dentistry
	Medicine	Medicine
	Veterinary Medicine
Institute of Pharmacy	Pharmaceutical Sciences	Biomedical Sciences	Clinical Biology (for pharmacists)
		Pharmaceutical Sciences	Hospital Pharmacy
			Industrial Pharmacy
Faculty of Social and Political Sciences	Human and Social Science	Anthropology
	Political Science	Human Resources Management
	Sociology and Anthropology	Political Science (1 or 2 years)
		Political Science: International Relations
		Population and Development
		Public Administration
		Sociology
		Sociology and Anthropology (1 year)
		Work Science (1 or 2 years)
Solvay Brussels School of Economics and Management	Business Engineering	Business Engineering	Industrial Management and Technology
	Economics	Economics (1 or 2 years)	Microfinance
Institute of European Studies		European Studies	European Law
			Interdisciplinary Analysis of European Construction

At the heart of the Free University of Brussels there are at least 2000 PhD students and around 3600 researchers and lecturers who work around different scientific fields and produce cutting-edge research.

The projects of these scientists span thematics that concern exact, applied and human sciences and researchers at the heart of the ULB have been awarded numerous international awards and recognitions.

The research carried out at the ULB is financed by different bodies such as the European Research Council, the Walloon Region, the Brussels Capital Region, the National Fund for Scientific Research, or one of the foundations that are dedicated to research at the ULB; the ULB Foundation or the Erasme Funds.

Since the early 2000s, the MAPP project has started studying political party membership evolution through the time.

University rankings
Global – Overall
ARWU World	101–150 (2023)
CWUR World	211 (2020–21)
CWTS World	359 (2020)
QS World	189 (2024)
THE World	201–250 (2024)
USNWR Global	=222 (2023)

For pre-1970 notable faculty and alumni, see Free University of Brussels:

• Ilya Prigogine (1917–2003): Nobel Prize in Chemistry in 1977
• François Englert (b. 1932): Nobel Prize in Physics in 2013
• Denis Mukwege (b. 1955): Nobel Prize for Peace in 2018

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  Ilya Prigogine, Nobel Prize in Chemistry (1977)
• 
  François Englert, Nobel Prize in Physics (2013)
• 
  Denis Mukwege, Nobel Prize for Peace (2018)

• List of split up universities
• Science and technology in Brussels
• Top Industrial Managers for Europe
• Atomium Culture
• Institut Jules Bordet
• Royal Statistical Society of Belgium
• University Foundation

• Despy, A., 150 ans de L'ULB. Université libre de Bruxelles, Brussels, 1984
• Noel, F., 1894. Université libre de Bruxelles en crise, Brussels, 1994

Media related to Université libre de Bruxelles at Wikimedia Commons

• Official website
• The ULB, a university born of an idea
• ULB, at a glance

50°48′42″N 4°22′52″E / 50.81167°N 4.38111°E / 50.81167; 4.38111