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[[File:Baron2.jpg|thumb|alt=atheism|right|200px|[[Portrait]] of Paul-Henri Thiry]]
'''Paul-Henri Thiry''', Baron d'Holbach (1723–89) was a French [[philosophy|philosopher]] during the [[Enlightenment]]. He was an author, and one of the [[Encyclopedists]] (French Encyclopédie) who advocated [[naturalism|naturalistic]] and [[materialism|materialistic]] ideas.<ref>[http://plato.stanford.edu/entries/holbach/ Paul-Henri Thiry] - ''Stanford Encyclopedia of Philosophy''</ref>See also: [[French atheism]]
His most well known work was ''Système de la nature'' (''The System of Nature'') published in 1770, which was first published under the name of Jean-Baptiste de Mirabaud (a former secretary of the Académie française who had died about ten years previously).
