• In March 297, Diocletian issued a decree against the Manichaeans
(a Gnostic religion that combined Zoroastrian and Christian
elements) as a new religion that broke the tradition of the Roman
nation: “It is criminal to throw doubts on what has been established
from ancient times.”
• Between February 303 and March 304, Diocletian issued four
decrees against Christians, first attacking worship and banning
books and culminating with the demand that all inhabitants of
the empire must offer sacrifice to the gods on pain of deportation
or death. Historical evidence suggests that these edicts were
vigorously pursued and that many Christians lost property, position,
and life itself during the persecution.
• Diocletian resigned the
position of Augustus in 305,
and his successors, Galerius
and Maximinus Daia, waged
a more ferocious persecution
until the spring of 313. It was
not uniformly imposed, but the
pressure was continuous for a
period of more than 10 years.
The Reign of Constantine
• In most respects, Constantine
adhered to the same premise as
Diocletian concerning imperial
rule and religion.
• First, he sought to establish a
unified rule by making himself
the sole Augustus. At one
point at the beginning of 310,
the empire had seven rival
The real privileging of
Christianity by the emperor
Constantine became apparent
with the practice of donating
formerly pagan temples for use
in Christian worship.
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