Résumé du livre : In the eighteenth century the tradition of open-air painting was based in Italy, Rome in particular. Artists came from all over Europe to study classical sculpture and architecture, as well as masterpieces of Renaissance and Baroque art. During their studies, groups of young painters visited the Italian countryside, training their eyes and their hands to transcribe the effects of light on a range of natural features. The practice became an essential aspect of art education, and spread throughout Europe in the nineteenth century. This exhibition focuses on the artists' wish to convey the immediacy of nature observed at first hand.