How do you get Banner of Thankfulness with the console?

effect create_artifact_wall_banner_thankfulness_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 Banner of Thankfulness?

They get Court grandeur baseline +6 instead.

Court artifact · Large Wall Ornament

Banner of Thankfulness

IllustriousUniqueHoly relicThe Royal Court

Banner of Thankfulness is an illustrious large wall ornament artifact in Crusader Kings III: Court grandeur baseline +6, Men-at-Arms Maintenance -10%, Advantage against coreligionists +5, Military Order Hire Cost -25%, Piety +1/month, Heavy Infantry Damage +10% and 1 more. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. Made on 670.1.1. At game start it goes to the holder of Shia Caliphate (starts from 910.1.15) — 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 Banner of Thankfulness do in CK3?: Court grandeur baseline +6, Men-at-Arms Maintenance -10%, Advantage against coreligionists +5, Military Order Hire Cost -25%, Piety +1/month, Heavy Infantry Damage +10%, Light Cavalry Damage +10% (patch 1.20.0.3).
How do you get Banner of Thankfulness with the console?: effect create_artifact_wall_banner_thankfulness_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 Banner of Thankfulness?: They get Court grandeur baseline +6 instead.

This white silk banner is inscribed with golden letters and wrapped around a golden lance. Traditionally this banner and its one sibling have been carried in Caliphal processions.

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+6

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

islamic_artifact_access_trigger = yes

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

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

OR = {
	religion = religion:islam_religion
	main_rite = {
		rite_has_parameter = islamic_syncretic_actor
	}
}

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

History and who has it

Made before recorded history on 670.1.1.
Kept with the title Shia Caliphate from 881.1.1.
At game start: the holder of Shia Caliphate (starts from 910.1.15) — needs The Royal Court.

How it is made

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

effect create_artifact_wall_banner_thankfulness_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_thankfulness), common/artifacts/templates (banner_thankfulness) and the English localisation, Crusader Kings III 1.20.0.3.