Leroux evolved from the elitist Saint-Simon movement to socialism, the term he was the first to coin in 1834. He saw fraternité as being central but being challenged by both liberté and égalité. He fought for mutualist and associationist socialism. Lived in exile from 1851 to 1860.
He died under the Paris Commune in April 1871 and was buried in the Montparnasse cemetery.
- 35 Quai des Grands Augustines (at the time no 40): Pierre Leroux’s birthplace in a small bar run by his parents
- 14 Rue Champagne. Leroux attended the Lycee Champagne.
- 6 rue Monsigny: Third floor office of the liberal newspaper Le Globe set up by Leroux and Paul-François Dubois in September 1824 before Leroux became a Saint-Simonien around 1830, when the paper becomes the organ of the Saint-Simoniens.
- 4 rue des Poitevins: Printshop where Leroux worked when he launched Le Globe, and were it was printed.
- 10 rue Jacob: Pauline Roland‘s address. Leroux also lived there for some time in 1832.
- 26 rue des Saints-Pères: Office of La Revue encyclopédique where Leroux first used the word ‘socialism’ in an article published in March 1824 called ‘From Individualism to Socialism‘.
- 20 rue de Savoie: Leroux was involved in setting up an illegal skilled workers’ association of Parisian typesetters here in 1839. Typesetting became the most unionised sector of Paris workers by the end of the 19th century.
- 87 boulevard du Montparnasse: Leroux and George Sand set up the journal called the Revue des Indépendants in 1841 in the Hunting lodge at this address.
- 14 rue des Moulins (at the time 32, rue des Moulins, on the corner with la rue Neuve des Petits Champs): The location of the offices of the Franco-German Annals, where Leroux met Marx, Proudhon, Bakunin, Cabet, Blanc and many other socialists in 1844.
- Palais Royal garden: This was where in March 1848 Leroux, Barbès. Proudhon, Arago and others founded the Revolution Club.
- 12 ter rue Coquillière: The office of The True Republic in whose March issue Leroux, Sand and Barbès argue that ‘Without social reform, there is absolutely no true Republic’.
- Paris Town Hall, 10 place de l’ Hôtel de Ville: On 15 May 1848 Leroux is one of those who take over the Town Hall and proclaim a new government, before being thrown out and then arrested.
- 3 rue Coq Héron: In 1848 the offices of two socialist papers set up by Leroux, ‘The Republic‘ and ‘The Organiser of Work‘ were both based at this address.