I think they were there, just very faded with age. I can faintly see one or two if I zoom in on the picture. But I could be wrong, too.
Everything religious has a reason until you point out why that doesn't make sense, and then the response is, "it's a metaphor, don't take it seriously".
I'm going to extend that pattern to it's logical conclusion and conclude that none of it makes sense and nobody should take any of it seriously.