The far-reaching transformation of grand opera into a modern medium of spectacle was inaugurated by Giacomo Meyerbeer’s Robert le diable. In the Act III ballet, with the theater darkened, the dead left their graves, and, phantom-like, haunted the stage. Those “ghosts” of deceased nuns clad in white ushered in a new genre, the ballet blanc, while another phantom—Robert’s mother—bestowed on grand opera the gift of lyric spectrality when Alice, in Act V, relayed the woman’s last words. Parisian mélomanes regarded this moment of song with special reverence after the 1830s and, arguably, its lyrical qualities guided efforts to reform singing in the 1830s and 40s. But, at the same time, Robert ushered in a new understanding in Paris of opera as an art of dream-like states: indeed, it was the visual procedures of phantasmagoria and diorama that inspired the radical change in Meyerbeer’s art of composition.