Dionysus or Dionysos[a] is the god of the grape-harvest, winemaking and wine, of fertility, ritual madness, religious ecstasy, and theatre in ancient Greek religion and myth.
He is also known as Bacchus (/ˈbækəs/ or /ˈbɑːkəs/; Greek: Βάκχος, Bákkhos), the name adopted by the Romans; the frenzy he induces is bakkheia. His thyrsus, sometimes wound with ivy and dripping with honey, is both a beneficent wand and a weapon used to destroy those who oppose his cult and the freedoms he represents. As Eleutherios ("the liberator"), his wine, music and ecstatic dance free his followers from self-conscious fear and care, and subvert the oppressive restraints of the powerful. Those who partake of his mysteries are believed to become possessed and empowered by the god himself.