How do you get Pentapyrgion with the console?

effect create_artifact_sculpture_cabinet_pentapyrgion_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 Pentapyrgion?

They get Court grandeur baseline +3, Renown +0.04/month instead.

Court artifact · Furniture

Pentapyrgion

MasterworkUniqueThe Royal Court

Pentapyrgion is a masterwork furniture artifact in Crusader Kings III: Court grandeur baseline +3, Renown +0.04/month, Prestige +0.25/month, Powerful Vassal Opinion +5, Powerful Vassal Councillor Levy Contribution +4%. Quality 30 and wealth 30; maximum durability 75, and it does not wear out. Made on 839.6.1 for Theophilos Amorios in Constantinople. 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 Pentapyrgion do in CK3?: Court grandeur baseline +3, Renown +0.04/month, Prestige +0.25/month, Powerful Vassal Opinion +5, Powerful Vassal Councillor Levy Contribution +4% (patch 1.20.0.3).
How do you get Pentapyrgion with the console?: effect create_artifact_sculpture_cabinet_pentapyrgion_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 Pentapyrgion?: They get Court grandeur baseline +3, Renown +0.04/month instead.

This elegant cupboard was built by Emperor Theophilos to display vases, crowns and other valuables in the Chrysotriklinos, the reception hall of the Great Palace of Constantinople.

Effects

Court grandeur baseline+3
Renown+0.04/month
Prestige+0.25/month
Powerful Vassal Opinion+5
Powerful Vassal Councillor Levy Contribution+4%

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
Renown+0.04/month

Who can benefit (can_benefit) (9 lines of game script)

OR = {
	is_roman_emperor_trigger = yes
	liege ?= {
		is_roman_emperor_trigger = yes
	}
	culture = {
		has_cultural_pillar = heritage_byzantine
	}
}

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

History and who has it

Made on 839.6.1 for Theophilos Amorios in Constantinople.
Kept with the title Byzantine Empire from 842.1.20.
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_sculpture_cabinet_pentapyrgion_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_sculpture_cabinet_pentapyrgion_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 (pentapyrgion_modifier), common/artifacts/templates (pentapyrgion_template) and the English localisation, Crusader Kings III 1.20.0.3.