Ohlig was the co-editor with
Gerd Rudiger Puin of the book
Die dunklen Anfänge. Neue Forschungen zur Entstehung und frühen Geschichte des Islam ["
The Hidden Origins of Islam: New Research Into Its Early History" (Hans Schiller Verlag, 2005/Prometheus Books 2008)], which argues that
Islam was not originally conceived as a distinct religion. Ohlig and Puin's thesis propounds that according to the evidence of
Arab coinage, and the inscription in the
Dome of the Rock in the late 7th century, with the letters
MHMT and the term
Muhammad meaning "the revered" or "the praiseworthy" and the Dome's bearing Christian symbols such as crosses, it suggests that the term Muhammad was a Christian honorific title referring to Jesus, as in the hymn of the mass ("praise be to he that comes...") With his approach of research Ohlig was a representative of the "Saarbrücken School" which is part of the
Revisionist School of Islamic Studies. Ohlig died on 14 January 2024, at the age of 85. == Works ==