June 13, 313 - Edict of Milan Issued
The Edict of Milan, a proclamation issued by Constantine I and Licinius on June 13, 313, officially established religious tolerance in the Roman Empire. This edict allowed citizens to worship the deity of their choice, assured Christians of their legal rights, and returned previously confiscated property to Christians. While many previous similar edicts were short-lived, the Edict of Milan had a marked effect on religion across the empire and eventually led to the establishment of Christianity as the official religion of the Roman Empire.