Wicked is a touring Broadway musical that dramatizes the backstory of the witches from The Wizard of Oz with music by Stephen Schwartz and a book by Winnie Holzman. The national touring company performs at the Boston Opera House, presenting a large-scale, spectacle-driven production noted for its elaborate costumes, special effects, and dramatic reimagining of familiar characters. The show is widely recognized as a major commercial and critical success within contemporary American musical theatre, often drawing both longtime fans and new audiences to its regional engagements.