Pareidolia is the name for the phenomenon of perceiving other things in things — in stones, for instance, the faces of people or the heads of animals. A well-known example is the Face on Mars. Pareidolia is a misinterpretation of objects produced by the brain, which alters them according to its notions or completes them into something familiar. Over the course of a year the Swiss painter and writer Jean Willi photographed stones that have faces, discovering a stone realm that seems to teem with petrified 'souls.' Very often it is the position of the sun that models a face and makes it invisible again as the light changes; sometimes it is only two dark spots that the viewer recognizes as eyes in order to make a face. The interesting question is what we really see and what we consciously or unconsciously reshape into something familiar. Perhaps the beginnings of art can be traced back to such sightings; shamans report that perceiving faces in plants and stones is the precondition for contacting certain spirits. None of the stones were arranged, nor the photos subsequently altered. The stone faces were taken between 27 April 2015 and 12 January 2017 on Ibiza.