The ontological question challanges the nature of the existence of works of art. The text presents basic questions that meaningfuly put questions about the ontological nature of art. It also examines the hypothesis of the physical object and R. Wollheim's arguments against this hypothesis. The essence of the article is the reconstruction of P. Lamarque's approach, which in his book, Art & Object, distinguishes these two elements as key to explain how works of art exist. The object is considered to (...) be a medium, but from the point of view of pure objects, artwork does not exist. Lamarque argues that art occurs where there is also cultural and institutional understanding of objects as works of art. (shrink)