Art can be objectified after the death of the artist, in for example Degas's sculptures cast after his death, or Cezanne's unsuccessful sketches which were presented as art objects following his death.

There is a debate as to why "art objects" made by artists are valued higher than craft objects made by Craftsmen.
In 1973 Lucy Lippard anthologised the de-materialization at work in conceptual art.

Artwork by milo