Johannes Juliaan Gijsbert "Hans" Jansen (Dutch pronunciation: [joːˈɦɑnəs ˈjyliaːn ˈɣɛisbɛrt ˈɦɑns ˈjɑnsən]; 17 November 1942 – 5 May 2015) was a Dutch politician, scholar of contemporary Islam and author. Hans Jansen belonged to the "revisionists" in Islamic Studies, i.e. he fundamentally doubted the historicity of the Islamic traditions on early Islam which were written only 150 to 200 years after Muhammad. Moreover, Jansen doubted the existence of Muhammad as a historical person. Hans Jansen's parents were strict Calvinists. At the age of 17, Jansen began studying theology at the University of Amsterdam, yet changed the subject after one year to Arabic and Semitic languages. In 1966 he spent one year in Cairo in order to learn Arabic. Then he continued his studies at the University of Leiden where he made his Ph.D. in 1974. More information...
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