The Edict of Milan was a proclamation signed by the Roman emperor Constantine and Lucinius in 313 A.D. It was a landmark agreement which established religious toleration towards the Christians in the Roman empire.
Through this letter of tolerance, the Christians within the Roman empire were given numerous rights and protection to attain and practice religious freedom.
The Edict of Milan also vowed to make reparations to the Christians who were persecuted by previous emperors.