"Connoisseur - Norman Rockwell"

In this painting by Norman Rockwell, we see the old gentleman studying one of the art pictures at a gallery. Look at the posture and studious look on the gentleman's face.

This appeared as a cover for the Saturday Evening Post of January 13, 1962 - "when I heard of a craze or a fad or anything which everyone was talking about, I'd do a cover of it"