Plants and Things by Robert Clark (1920-1999). The breathtaking artwork is of a pottery shed that is illuminated by sun peeking through an open door. There is a crispness to the work that is done with the medium on egg tempera. This method is a durable, fast-drying painting medium made by mixing dry pigments with egg yolk, water, and sometimes vinegar. It requires painting in thin, translucent, cross-hatched layers on rigid, absorbent surfaces and offers unmatched precision, a silky finish, and longevity. The art piece is signed with title and date of 1973. It is framed in gold with minimal visible wear for its vintage usage.