Die Reichskirche nach Konstantin dem Grossen - Freiburg, 1973-1975.

Von der Urgemeinde zur früchristlichen Grosskirche / von Karl Baus. - Freiburg, 1962.

Storia della Chiesa / diretta da Hubert Jedin. - Milano, 1975-1981.

The imperial Church from Constantine to the early Middle Ages / by Karl Baus ... [et al.]. - New York, 1986.

From the apostolic community to Constantine / by Karl Baus. - New York, 1986.