Sources of the Apostolic Canons

Reply to Harnack on the Essence of Christianity; Lectures Delivered in the Summer of 1901 Before Students of All Faculties in the University of Griefswald

Geschichte Der Königlich Preussischen Akademie Der Wissenschaften Zu Berlin

History of Dogma; Volume 4

Histoire des dogmes (Patrimoines - Christianisme) (French Edition)

New Testament Studies V.

Monasticism : Its Ideals and History, and the Confessions of St. Augustine

New Testament Studies. III. the Acts of the Apostles

Militia Christi

Grundriss der Dogmengeschichte

What Is Christianity?