Osterhammel’s masterpiece, The Transformation of the World, can be summarized with a simple phrase as “the portrait of an epoch” (p. xvii). It sketches out the concepts, agenda, concerns and mentality of the nineteenth century, the longest century that all humanity has ever seen. The book has been influential both in academic and popular circles which gave birth to a number of reviews. What makes this review different from the previous ones would be that it handles the book with special emphasis on the Ottoman-Turkish history parts and passages.