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Persecution of Christians in the Roman Empire

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Through Roman Empire, Christianity and Jesus

According to Tacitus, the first wave of organized persecution occurred under Nero (r. 54–68), who blamed Christians for the Great Fire of Rome in 64. A number of mostly localized persecutions occurred during the reign of Marcus Aurelius (r. 161–180). After a lull, persecution resumed under Decius (r. 249–251) and Trebonianus Gallus (r. 251–253). The Decian persecution was particularly extensive, as Decius strived to restore the Roman golden age in part by forcing pagan practices upon the Christian community. Another wave of persecution began under Valerian (r. 253–260), but ceased abruptly after he was captured and taken prisoner by the Sasanian Empire during the Battle of Edessa of the Roman–Persian Wars. Under his successor Gallienus (r. 253–268), whose reign was marred by rapidly escalating military conflicts of the Crisis of the Third Century, the first ever decree of tolerance was issued for Christian practices and places of worship, although it stopped short of recognizing Christianity as a religion with legal status.

Emperor Diocletian (r. 283–305) began the Diocletianic persecution, which was the final and the most severe wave of persecution of Christians by the Roman state. It was enforced until the accession of Galerius (r. 305–311), who issued the Edict of Serdica, and the death of Maximinus Daza (r. 310–313). After Constantine the Great (r. 306–337) defeated his rival Maxentius (r. 306–312) at the Battle of the Milvian Bridge in October 312, he and his co-emperor Licinius issued the Edict of Milan, which decriminalized Christianity and suppressed pagan populations throughout the Roman Empire. In 380, Theodosius I (r. 379–395) issued the Edict of Thessalonica, officially establishing Christianity as the Roman state religion. It was also during the reign of Theodosius I that pagan practices were overtly deemed punishable offenses, which laid the framework for early Byzantine anti-pagan policies.

Religion in Roman society

Roman religion at the beginning of the Roman Empire (27 BC - 476) was polytheistic and local. Each city worshipped its own set of gods and goddesses that had originally been derived from ancient Greece and become Romanized. This polis-religion was embedded in, and inseparable from, "the general structures of the ancient city; there was no religious identity separate from political or civic identity, and the essence of religion lay in ritual rather than belief". Private religion and its public practices were under the control of public officials, primarily, the Senate. Religion was central to being Roman, its practices widespread, and intertwined with politics.

Support for this form of traditional Roman polytheism had begun to decline by the first century BC when it was seen, according to various writers and historians of the time, as having become empty and ineffectual. A combination of external factors such as war and invasions, and internal factors such as the formal nature and political manipulation of traditional religion, is said to have created the slow decline of polytheism. This left a vacuum in the personal lives of people that they filled with other forms of worship: such as the imperial cult, various mystery cults, imported eastern religions, and Christianity.

The Roman approach to empire building included a cultural permeability that allowed foreigners to become a part of it, but the Roman religious practice of adopting foreign gods and practices into its pantheon did not apply equally to all gods: "Many divinities were brought to Rome and installed as part of the Roman state religion, but a great many more were not". This characteristic openness has led many, such as Ramsay MacMullen to say that in its process of expansion, the Roman Empire was "completely tolerant, in heaven as on earth", but to also go on and immediately add: "That [tolerance] was only half the story".

MacMullen says the most significant factor in determining whether one received 'tolerance' or 'intolerance' from Roman religion was if that religion honored one's god "according to ancestral custom". Christians were thought of badly for abandoning their ancestral roots in Judaism. However, how religion was practised was also a factor. Roman officials had become suspicious of the worshippers of Dionysus and their practice of Bacchanalia as far back as 186 BC because it "took place at night". Private divination, astrology, and 'Chaldean practices' were magics associated with night worship, and as such, had carried the threat of banishment and execution since the early imperial period. Archaeologist Luke Lavan explains that is because night worship was private and secret and associated with treason and secret plots against the emperor. Bacchic associations were dissolved, leaders were arrested and executed, women were forbidden to hold important positions in the cult, no Roman citizen could be a priest, and strict control of the cult was thereafter established.

This became the pattern for the Roman state's response to whatever was seen as a religious threat. In the first century of the common era, there were "periodic expulsions of astrologers, philosophers and even teachers of rhetoric... as well as Jews and...the cult of Isis". Druids also received the same treatment, as did Christians.

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