How did The Age of Constantine the Great describe the period of Constantine’s rule?

In his work Die Zeit Konstantins des Grossen (1853; The Age of Constantine the Great), the Swiss historian Jacob Burckhardt described the period of Constantine’s rule as a transitional age.1

Burckhardt characterized this era as being "unhealthy and immoral" while simultaneously "teeming with religious and cultural activity". Although he acknowledged that the rise of Christianity was an inevitable development necessary for the emergence of a distinct culture during the Middle Ages, his personal sympathies remained with the waning forces of the ancient world.1