Double artwork. Double archiving released by the Giorgio and Isa De Chirico Foundation, Rome (March 12, 1994) as per photographic documentation attached to the work. Certificate of guarantee Picma Arte, Verona. the 27 drawings are cataloged separately at the Giorgio De Chirico Foundation, each with a written declaration on a photograph bearing the progressive archive number. Publication: Giorgio De Chirico, 27 original drawings from classicism to metaphysics, Picma Arte, Verona. 1924-1929.