What this song renders
The documented frame is firm. Olympias married Philip II in 357 BC and bore Alexander in July 356. Plutarch (Alexander 2) records her zealous part in the ecstatic Dionysian rites and the great tame serpents she carried in the dances — genuine cult practice, not the enchantress the hostile tradition later made of it.
The bed is where record and rumour knot together. Plutarch (Alexander 2.6, 3.1–2) reports a serpent seen stretched out beside the sleeping Olympias, Philip’s affection cooling afterwards, and his embassy to Delphi; the whisper that a god, not Philip, fathered Alexander grows from here. Plutarch himself hedges, and elsewhere reports Olympias mocking the god-father story.
What the track does is give the claim to her. The divine paternity is not asserted by the album — it is asserted by Olympias, in her own voice, as a character’s claim. A listener can hear a woman who believes it or a woman authoring a dynasty. The door closing, the court’s silence, and every word of contempt are invention: no source gives Olympias a word on her own wedding night.
The marriage, the birth, the cult and the serpents are documented; the serpent in the bed is Plutarch’s report, entangled with slander. The god as father is saga at best — here it is Olympias’s own claim, not the album’s. The voice, the closed door and the court’s arithmetic are dramatisation.