I'm not sure if the following is considered religious propaganda, based on the definition of the word, but it is an example of false imagery that has strongly influenced Christendom for five centuries. Apparently, the painter who painted this portrait of "Jesus" used Cesare Borgia as the model. Cesare was the son of Pope Alexander VI and lived in the late 1400's.
This image has become a religious icon in Christendom and has spawned many other similar looking Jesus paintings. If you ask the average Christian who this painting depicts, they will unequivocally reply, "Jesus" - not, "an artists' depiction of Jesus" or most accurately "the polar opposite of what Christ actually looked like based on the prophetic description from the book of Isaiah."
Imagine the famous picture above, representing, possibly, the most handsome man who has ever lived, hanging on the wall with the following passage underneath it: "He hath no form nor comeliness; and when we shall see Him, there is no beauty that we should desire Him. He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from Him; He was despised, and we esteemed Him not." (Isa. 53:2b,3)