Which penitential practices were used by Christians in the Roman world during the 3rd century?

In the 3rd century, Christians in the Roman world who committed grave offenses were subject to a formal disciplinary system designed to maintain the holiness of the community. Because the church viewed certain lapses—such as apostasy, adultery, and murder—as serious threats to the faith, it required offenders to undergo public penitential exercises.12

These practices included:

• Mortification: Penitents engaged in acts of self-denial, such as fasting, wearing sackcloth, and lying in ashes.1
• Almsgiving: The practice of giving to the poor was performed as a penitential work.12
• Public Confession and Excommunication: Grave offenders publicly acknowledged their sins before the bishop and the congregation. They were then excommunicated for a period, during which they performed their penance.2
• Absolution: After completing these exercises, penitents were granted absolution and publicly restored to communion by the bishop.12

While these practices were initially public and often limited to a single occurrence for grave sins, they were essential for reconciling the individual with the redeemed community. These disciplinary measures were also closely tied to the broader ascetic movement, which encouraged such works as a means of purification.12