Just an interesting piece of research that is sort of connected.

'In 1999, Islamic art expert Wijdan Ali wrote a scholarly overview of the Muslim tradition of depicting Mohammed. In that essay, Ali demonstrates that the prohibition against depicting Mohammed did not arise until as late as the 16th or 17th century, despite the media's recent false claims that it has always been forbidden for Muslims to draw Mohammed. Until comparatively recently in Islamic history, it was perfectly common to show Mohammed, either in full, or with his face hidden. Even after the 17th century, up to modern times, Islamic depictions of Mohammed (especially in Shi'ite areas) continued to be produced.'

I don't go to mythical places with strange men.
-- Douglas Adams, The Long Dark Tea-Time of the Soul.