Life in the Roman World of Nero and St. Paul

The Old Roman World : the Grandeur and Failure of Its Civilization.

The Ancient Church: Its History, Doctrine, Worship, and Constitution

The Basis of Early Christian Theism

The Holy See and the Wandering of the Nations, from St. Leo I to St. Gregory I

Landmarks in the History of Early Christianity

Sketches of Church History, from A.D. 33 to the Reformation

Dissertatiunculae Quaedam Critico-Theologicae

The Early Christians in Rome

Constantine the Great: The reorganization of the Empire and the triumph of the Church

Aus dem Leben der Antike

La rovina della civiltà antica