I should have done this commentary on this mural from the US Library of Congress as part of last year's fourth centennial events, but, alas, I was kept too busy with other things to do.
Anyway, better late than never, they say...
The painting is by William de Leftwich Dodge.
Wall plaques, clockwise from the northwest corner, bear the names: LITERATURE, Greece, Italy, England. Their arrangement from left to right mirrors the subjects of the allegories above; a mise-en-scène not left at all to chance.