Modifier
banner_of_edessa_modifier
The modifier banner_of_edessa_modifier is a named modifier in Crusader Kings III; the game gives it no name. It gives Court grandeur baseline +3, Clergy Opinion +5, Piety +1/month, Temple Buildings Construction Cost -20%, Temple Holding Construction Cost -20%. No add_…_modifier command in common/, events/ or history/ adds it. Patch 1.20.1.2, from game/common/modifiers/00_historical_artifact_modifiers.txt.
Effects
Where the game adds it
No add_…_modifier command in common/, events/ or history/ adds it.
Source: game/common/modifiers/00_historical_artifact_modifiers.txt (line 119), the English localisation (banner_of_edessa_modifier, banner_of_edessa_modifier_desc) and every add_…_modifier / remove_…_modifier in common/, events/ and history/, Crusader Kings III 1.20.1.2.