The birth of opera - Monteverdi to Purcell; Baroque opera -Vivaldi to Handel; the Reformation of opera - Gluck to Mozart; the age of Romanticism; Verdi, Wagner and their contemporaries; opera in transition - the generation of Puccini, Massenet and Debussy; the era of modernism; opera since World War II; directory of singers; directory of conductors. (Part contents).