He described the performance, titled "Stone," as "an inner journey to find out what the world is."
The boulder contains air holes that will allow Poincheval to breath, as well as a space to hold a supply of water, soup and dried meat. Cables will also be placed through the stone to monitor his heart and provide him an emergency video feed.
"The purpose is to feel the aging stone inside the rock," he said. "There is my own breathing, and then the rock which lives, still humid because it was extracted not so long ago from the quarry. So there is that flow, that coming and going, between myself and the stone."
When he emerges from the boulder Poincheval will begin a second performance, titled "Egg," in which he will sit on a dozen eggs for four weeks until they hatch.
The artist, who previously spent two weeks inside of a stuffed bear, said once the eggs hatch the chicks "will go and live with my parents."
