Bernard Le Bovier de Fontenelle, also called Bernard Le Bouyer de Fontenelle, was a French author and an influential member of three of the academies of the Institut de France, noted especially for his accessible treatment of scientific topics during the unfolding of the Age of Enlightenment.

The Age of Enlightenment was the intellectual and philosophical movement that occurred in Europe in the 17th and the 18th centuries. The Enlightenment featured a range of social ideas centered on the value of knowledge learned by way of rationalism and of empiricism and political ideals such as natural law, liberty, and progress, toleration and fraternity, constitutional government and the formal separation of church and state.