Jean-Jacques Rousseau (1712-1778) writing a sheet music. From a private collection. [Getty Images]

Jean-Jacques Rousseau (1712-1778) writing a sheet music. Artist: Anonymous (Photo by Fine Art Images/Heritage Images/Getty Images) — see more

Jean-Jacques Rousseau (1712-1778) writing a sheet music. Artist: Anonymous (Photo by Fine Art Images/Heritage Images/Getty Images)

Hulton Archive Heritage Images