Weißes Strukturrelief R 62-1 , by johannes jan schoonhoven , 1962 , abstract , Minimalism style
A picture of a white air vent on a white background.
 of a square air vent. The air vent is made of concrete. The concrete has a slightly faded look to it. There are rows of small squares in the air vent that are evenly spaced. The corners of the vent are slightly raised.  white.