- Return of tolerance towards Christians in Edessa under Abgar VIII (177–212). For a time on coins an effigy of Abgar appears with him wearing a tiara with a Christian cross.
- The 'portrait,’ however, remains hidden and gradually falls into oblivion; legend centres around an apocryphal exchange of letters between Christ and Abgar.
- The end of Byzantine rule. The city experiences a series of floods (approximately one per century).
For centuries no one knows of the existence of the Shroud, which rests in a hermetically sealed niche above the west gate.