Filotheus Bryenius' Hecclisiastic History

As it happens in eah other section of Theology Science, the introduction is usually before the Hecclesiastic History. The necessity of introduction is obvious from the content because the clues get anyone infotmed how can be meant or defined the Churh, which the theme and the purpose of the Hecclesiastic History, which are the sources that can draw anyone valuable information from, which are the science characteristics, which the subsidiary sciences, and which are the critiria of the Hecclesiastic History, how its information is ordered, which is the value and utility and the target of its studying, and who have written about hecclisiastic history until now.