How do you get Image of Edessa with the console?

effect create_artifact_wall_banner_edessa_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

What if the owner can't benefit from Image of Edessa?

They get Court grandeur baseline +3 instead.

Court artifact · Pedestal Item

Image of Edessa

IllustriousUniqueHoly relicThe Royal Court

Image of Edessa is an illustrious pedestal item artifact in Crusader Kings III: Court grandeur baseline +3, Clergy Opinion +5, Piety +1/month, Temple Buildings Construction Cost -20%, Temple Holding Construction Cost -20%. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. At game start it goes to the holder of Byzantine Empire — needs The Royal Court. It needs The Royal Court. Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (3)

What does Image of Edessa do in CK3?: Court grandeur baseline +3, Clergy Opinion +5, Piety +1/month, Temple Buildings Construction Cost -20%, Temple Holding Construction Cost -20% (patch 1.20.0.3).
How do you get Image of Edessa with the console?: effect create_artifact_wall_banner_edessa_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).
What if the owner can't benefit from Image of Edessa?: They get Court grandeur baseline +3 instead.

This is the Mandylion, a cloth bearing a miraculous image of the face of Jesus, Christianity's first icon. Its origin is connected to king Abgar of Edessa.

Effects

For an owner who can't benefit from it

The template gives these instead of the effects above when its “can benefit” check fails:

Court grandeur baseline+3

Who can benefit (can_benefit) (1 line of game script)

christian_artifact_access_trigger = yes

As written in game/common/artifacts/templates (edessa_template).

Counts as a holy relic for (is_holy_relic) (6 lines of game script)

OR = {
	religion = religion:christianity_religion
	main_rite = {
		rite_has_parameter = christian_syncretic_actor
	}
}

As written in game/common/artifacts/templates (edessa_template).

History and who has it

Made before recorded history in Edessa.
At game start: the holder of Byzantine Empire — needs The Royal Court.

How it is made

The game creates it with the scripted effect create_artifact_wall_banner_edessa_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_wall_banner_edessa_effect = { OWNER = root }

Built from the effect's file; not run in the game by us.

Source: game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt, common/modifiers (banner_of_edessa_modifier), common/artifacts/templates (edessa_template) and the English localisation, Crusader Kings III 1.20.0.3.