Named in memory of the philosopher and priest Etienne Bonnot de Condillac (1715–1780), the leading advocate in France of the ideas of John Locke {see planet  (7010)}. In 1740 he became acquainted with the Encyclopaedists, establishing his position there with his first book Essai sur l’origine des connaissances humaines in 1746. In his Trait’e des sensations (1754), which inspired Holbach and Diderot {see planets  (6956) and  (5351), respectively}, he expressed his views on sensations: “Human knowledge is entirely and exclusively based on observations made by the sense perception”. (M 34629) _ _.