In 1665 Athanasius Kircher published the treatise Mundus Subterraneus, to ex-plore the complex relationships between the visible forms of the landscape and the reasons that produce them. Kircher was peer of Claude Lorrain, who gave a critical contribution in founding landscape as an artistic genre, making indistinguishable its existence as a real place and its representation as a picture. Compared to Kircher, Lorrain had the greatest influence on Western landscape culture. Yet today, thanks to scholars and landscape architecture practitioners, Kircher’s (...) intuition seems effective to describe the contemporary idea of landscape as a performative field, encompassing all living forms, soils and waters, and intangible substances working together, impossible to understand just by the investigation of their visible forms. Today landscape exists because it is perceived and because it works: Lorrain and Kircher have finally met. (shrink)