There is an ongoing debate about the origin and time period of the Blue Koran. Jonathan Bloom placed the production of the book in Tunisia during the early Fatimid period mainly based on the abjad numbering system in the book; whereas Alain George attributed the book to eighth or ninth century Baghdad under the Abbasid Caliphate.[1][2] George's attribution stemmed from the script style. As plausible as the attributions are, scholars still lack strong evidence to anchor the book's origin and time period.