Βισνού is a major deity in Hinduism, known as the preserver and protector of the universe. He is often depicted with blue skin and four arms, holding a conch shell, a discus, a mace, and a lotus flower. Βισνού is part of the holy trinity, or Trimurti, which includes Brahma the creator and Shiva the destroyer. Βισνού is believed to incarnate in various forms, known as avatars, to restore cosmic order. The most famous avatars include Rama and Krishna. Devotees worship Βισνού through rituals, prayers, and festivals, celebrating his role in maintaining balance in the world.