Rockwell Kent painted a pair of post office murals in Washington DC. Kent lived, for a time, on a farm he called Asgaard. He made lithographs of Prometheus and Beowulf. I’m going to go out on a limb and guess that he was interested in mythology and ancient lit.
Rockwell may be best known, however, for his illustrations for a printing of Moby Dick, one of which was featured on a postage stamp in the American Illustrators set.