of materials, the inner forces of bearing and holding, the human work that is inherent in man-made things.Per Kirkeby once did a brick sculpture in the form of a house for a Documenta exhibition in Kassel The house had no entrance. lts interior was inaccessible and hidden. lt remained a secret, which added an aura of mystical depth to the sculptures other qualities.l think that the hidden structures and constructions of a house should be organized in such a way that they endow the body of the building with a quality of inner tension and vibration.This is how violins are made.They remind us of the living bodies of nature.