Artists, who have played with their own paredolia first, know how to play with the pareidolia of the beholders of their works.
I incidentally found this in December 2017 as bycatch from my Snark hunt:
2017-12-23, updated to 2019-01-01 just for the heck of it
In this image one of the elements has been marked (blue frame) which Henry Holiday borrowed from a 17th century painting (by an anonymous artist). This might be a bit different from the borrowing described by T. S. Eliot in 1920. The borrowing ot the pictorial allusion is inconspicuous. It doesn’t enrich Holiday’s illustration. It’s only purpose might be that of a signpost pointing to another work of art.