The classic fundamental work of the German scholar August Müller on the history of Islam analyzes events from the pre-Islamic history of the Arabs to the fall of the Abbasid dynasty, from the history of Muslim Spain to the history of Muslim Persia. In terms of the wealth of material and the breadth of coverage of countries and events, as well as thanks to the titanic efforts of the author to process Arabic written sources, "History of Islam" remains one of the most important studies today. Many terms, concepts and titles in the text are left exactly as the author wrote them. For a thoughtful reader, it will not be difficult to correlate the author's interpretation of words with their modern spelling.