Did the vision of the cherubim’s wings that spread upward in the Tabernacle (Exodus 25:25, 2 Kings 6:27) play a role in the design of the wings? Note the view of the rabbis in the Babylonian Talmud, Sukkah 5b. For illustrations of cherub wings from the ninth century B.C.E. see Elie Borowski, “Cherubim: God’s Throne?” BAR 21:04.