There is fine art you place on your wall, but there is also fine art you place on your mail. Not being able to afford much of the former, I collect the latter, especially postage stamps relating to literature.
Other stamps portray particular books or even characters from books. In 1993 the U.S. Postal Service issued 29-cent stamps honoring four classics in juvenile fiction: Rebecca of Sunnybrook Farm, Little House on the Prairie, Adventures of Huckleberry Finn and Little Women, with imagined scenes from each of these books on the stamps. A couple of years ago my wife's cousin, whose mother came from Australia, gave me five Australian stamps, issued in 1985, that honor classic children's books from Australia, none of which I had ever heard of. They are Elves & Fairies, The Magic Pudding, Ginger Meggs, Blinky Bill and Snugglepot Cuddlepie.
Other nations issue stamps honoring their own best writers. I have, for example, French stamps honoring Victor Hugo, Emile Zola and Albert Camus, as well as a Colombian stamp with Gabriel Garcia Marquez on its face.
A very few authors seem to be claimed by the whole world. I have, for example, stamps from the U.S., Italy and the Soviet Union honoring William Shakespeare, who lived in England. The Soviets also issued a stamp in 1960 showing Mark Twain.
I'd like to see more literary postage stamps being issued, but I'm grateful for the beauties we have.