Short insightful CNN article here.
“There have been historical instances of Muslims depicting the Prophet, says Omid Safi, a religious studies professor at the University of North Carolina who has studied the issue.
"We have had visual depictions of the Prophet in the form of miniatures and pictures in the Iranian context, the Turkish context, the central Asian Context,” says Safi, author of the book "Memories of Mohammed." “The one significant context where depictions of the Prophet have not been image-related has been in the Arab context.”
“As you go farther east, away from the Arabian Peninsula, you find depictions of the prophet in art,” said Johari Abdul-Malik, the imam for Dar Al-Hijrah Islamic Center in Falls Church, Virginia. He noted that images of the teachings of the prophet were sometimes used to bridge gaps in illiteracy.
“Adbul-Malik said that in the Quran, there is “no statement from the prophet requesting his image not be recorded.” The passages relating to a ban on creating images of the prophets come from the hadith, recordings of the sayings of the Prophet Mohammed and his closest companions. The hadith is not viewed on the same plane as the Quran but as important to understanding the Quran.”
Image of miniature C. 1315 from Wikipedia