Sven Kalisch (also Muhammad Sven Kalisch, born March 21, 1966) is a German who converted to Islam at age 15, became the first in Germany to hold a chair in Islamic theology (at University of Münster), then in 2008 announced that he had come to the conclusion that the prophet Muhammad probably never existed.
Official Islamic groups in Germany have referred to him as an apostate.
Germany’s Muslim Coordinating Council withdrew from the advisory board of Prof.