How do you get Reichskrone with the console?

effect create_artifact_reichskrone_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 Reichskrone?

They get Court grandeur baseline +6, Monthly Renown +5% instead.

Personal artifact · Headgear

Reichskrone

IllustriousUnique

Reichskrone is an illustrious headgear artifact in Crusader Kings III: Monthly Renown +5%, Vassal Limit +25, Monthly Prestige per Powerful Vassal on the Council +2%, Courtier and Guest Opinion +10. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. Made on 962.1.1 for Otto Ludolfing in Aachen. At game start it goes to the holder of Holy Roman Empire (starts from 1000.1.1). Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (3)

What does Reichskrone do in CK3?: Monthly Renown +5%, Vassal Limit +25, Monthly Prestige per Powerful Vassal on the Council +2%, Courtier and Guest Opinion +10 (patch 1.20.0.3).
How do you get Reichskrone with the console?: effect create_artifact_reichskrone_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 Reichskrone?: They get Court grandeur baseline +6, Monthly Renown +5% instead.

This is the Emblem of the office of Holy Roman Emperor. Guaranteed to catch the attention of every passing Duke.

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:

Who can benefit (can_benefit) (10 lines of game script)

OR = {
	has_title = title:e_hre
	any_liege_or_above = {
		has_title = title:e_hre
	}
	is_roman_emperor_trigger = yes
	any_liege_or_above = {
		is_roman_emperor_trigger = yes
	}
}

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

Who can equip it (can_equip) (14 lines of game script)

trigger_if = {
	limit = {
		has_ach_dlc_trigger = yes
		coronation_proper_artifact_crown_trigger = yes
		NOT = {
			scope:artifact = {
				category = court
			}
		}
	}
	NOT = {
		has_realm_law = uncrowned
	}
}

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

History and who has it

Made on 962.1.1 for Otto Ludolfing in Aachen.
Kept with the title Holy Roman Empire from 962.1.1.
At game start: the holder of Holy Roman Empire (starts from 1000.1.1).

How it is made

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

effect create_artifact_reichskrone_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 (reichskrone_modifier), common/artifacts/templates (reichskrone_template) and the English localisation, Crusader Kings III 1.20.0.3.