Joseph Beuys stated once “Kunst=Kapital”.
If I take this for granted and add to that
Kunst=Kultur then it should be valid, that
Deviated from Joseph Beuys´thesis you can say that autographs are or can be interpreted as ART.
As an hommage to Joseph Beuys I took a handwritten envelope from Beuys and placed it on an old DDR-Filz (“GDR-felt”) , the material he used often.