Vishnu was a minor deity in early times. Later on, he became one of the main Hindu gods. He appears as a man with four arms riding on a mythical bird or resting on a serpent. In his four hands, Vishnu holds a conch shell, a discus, a lotus and a mace.
From time to time, Vishnu descends to earth in a human, animal or creature form to restore the balance of good and evil in the world. It is thought that he has descended nine times already. Some of his more well-known incarnations are the hero Krishna, the hero Rama, a tortoise and a fish.