An article about the Prophet Muhammad in the English-language Wikipedia has become the subject of an online protest in the last few weeks because of its representations of Muhammad, taken from medieval manuscripts.

In addition to numerous e-mail messages sent to Wikipedia.org, an online petition cites a prohibition in Islam on images of people.

The petition has more than 80,000 “signatures,” though many who submitted them to ThePetitionSite.com, remained anonymous.

“We have been noticing a lot more similar sounding, similar looking e-mails beginning mid-January,” said Jay Walsh, a spokesman for the Wikimedia Foundation in San Francisco, which administers the various online encyclopedias in more than 250 languages.