The book by F. K. Funk is a living, fresh work that awakens thought. Both from the methodological side and from the wealth of material it contains, this work is exemplary. The author, one might say, achieved his intended goal. In an easy and accessible form, he managed to provide the entire amount of knowledge necessary for every educated theologian and historian. Striving for brevity, Funk threw out all the verbose thoughts and reflections that burden other textbooks. The facts themselves speak for him. Excluding all unnecessary and unimportant details and details, Funk diligently sets out everything that is of any significant importance. Covering the facts in many ways, he brings them together into one coherent system, making it easier for the reader to more successfully assimilate all the presented church-historical material. These outstanding advantages created Funk's textbook is a colossal success both in his homeland, where the book went through five major editions over the course of two decades, and abroad.