Peter Pan, his fellow characters, and the setting of Neverland have appeared in many works since the original books and play by J. M. Barrie. The earliest were the stage productions of the play, and an adaptation to silent film, done with Barrie's involvement and personal approval. Later works were authorised by Great Ormond Street Hospital, to which Barrie gave the rights to the Peter Pan works; these include adaptations of the main story in both animated and live-action films, musical stage productions, and a sequel novel. In addition, there have been numerous uses of Barrie's characters, settings, and storylines which challenged or took advantage of the changing copyright status of these elements, including reinterpretations, sequels, prequels, and spin-offs in a variety of media, including film, television series, and books.