Garuda's links to Vishnu - the Hindu god who fights injustice and destroys evil in his various avatars to preserve dharma, has made him an iconic symbol of king's duty and power, an insignia of royalty or dharma. His eagle-like form is shown either alone or with Vishnu, signifying divine approval of the power of the state. He is found on the faces of many early Hindu kingdom coins with this symbolism, either as a single-headed bird or a three-headed bird that watches all sides.