Geschichte des Qorāns

[6][7] As such, Noldeke's work also produced a consensus among Western scholars that the Quran reflected the preaching of Muhammad in two distinct locations, namely Mecca and Medina.

[8] After initial publication in 1860, the Geschichte was revised and expanded by Noldeke's students and successors Friedrich Schwally, Gotthelf Bergsträsser and Otto Pretzl until 1938.

Revisions and expansions by Schwally appeared between 1909 and 1919, and this included a new chapter not present in the previous edition, titled "Recent Christian Research on the Qur’an".

The expansions by Bergsträsser and Pretzl brought into particular focus the subject of the variant readings (qirāʼāt) of the Quran including how they had been received in the history of classical scholarship.

[3] The Corpus Coranicum project has been working with the aim of revising Noldeke's chronology since the developments that have occurred since its publication.