I saw a beautiful portrait on the back of a book of art and I can't remember the name of the painting or the artist. The portrait was of a bearded man, I think, and I remember part of his face being in the shadow. He was seated next to some books and there were rings on his hand. If this is familiar to you, please let me know! It had to have been a prominent artist-- the book was a collection of all of one man's art.