Babylon married a daughter of Cyaxares, and an equilibrium of the great powers (Mede and Babylon) was maintained until the rise of the Persians under Cyrus . Astyages = son of Cyaxares. Amytis, Astyages’ sister, queen of Nebuchadrezzar, whom he built the the Hanging Gardens of Babylon for. Persian/Anshan Achaemenid dynasty,