What happens when painting emancipates itself from all physical mediums, the piece of art disappears from the exposition site and it becomes immaterial, indiscernible within its surrounding space? What type of esthetic experience and embodied understanding of art is possible under these programmed and produced conditions, maybe dissimulated, and finally enunciated and affirmed next to and in place of that which presents itself with the title of art masterpiece? What type of description, definition and interpretation is necessary? What type of phenomenology, pragmatic, rhetoric, and ontology is called upon? What type of percepts, of effects and affects, of appearance and apparatus, are put into play in this esthetic relation lacking an artistic object? When there is nothing to see and to touch, what living forms, what beliefs, what qualities are dealt with? Until this day, after more than 50 years, the “Exposition of Void” of Yves Klein doesn’t quit asking these and other questions on aesthetics and to the history of art.