This book includes among the folds a study of the book "Al -Hafiz Moheb Al -Din Bin Al -Najjar Al -Baghdadi", which is learned from the tail of the history of Baghdad ", the first section dealt with the study and the second section dealt with the achievement of the text of the book. The first section (the study) is located in three chapters: the first chapter includes two topics: the first topic included the speech on the biography of Ibn al -Najjar: his life, his books, and his scientific position. The second topic was devoted to speech on "the renewed history of the city of peace": its method, its resources, and its importance. As for the second chapter: It is devoted to the words on Ibn al -Damietta and his book "Al -Mutawafar".