Jean Jaurès, the most important French socialist of the late 19th and early 20th centuries, was born in Castres in 1859. The town's small but well-made museum traces his life — schoolteacher in Albi, then philosopher, then journalist, then the deputy who led the parliamentary fight against the First World War — through letters, manuscripts, photographs, and political cartoons.
The exhibits are bilingual French-English, which is rare in a French regional museum, and the politics are presented with unusual clarity. Jaurès comes across not as a relic but as someone whose arguments — about pacifism, secularism, and the social state — still resonate. Allow an hour, more if the subject interests you. Admission is free.