A Masked Ball Composer Giuseppe Verdi Librettist Antonio Somma Based On a libretto by Eugene Scribe for Daniel Auber's opera Gustave III, ou Le Bal masque Company San Francisco Opera Association Touring Location Los Angeles, CA Venue Shrine Auditorium Season 1957 Language Italian Creative/Crew Conductor William Steinberg Stage Director(s) Paul Hager Chorus Director Gianni Lazzari Choreographer Willam Christensen Costumers Goldstein & Co. Cast Riccardo (King Gustave III of Sweden) Jan Peerce Renato (Count Anckarström, the King's Secretary) Robert Merrill Amelia (Countess Anckarström) Herva Nelli Ulrica, the Astrologer Claramae Turner Oscar, a page Sylvia Stahlman Silvano, a Sailor Heinz Blankenburg Samuele (Count Horn) Lorenzo Alvary Tommaso (Count Ribbing) Nicola Moscona Judge Howard Fried Amelia's servant Murray Kenig Show Dates Sat, Nov 2 1957, 8pm Time and Place End of Seventeenth Century; Sweden Scenes Act I, Scene 1 -- King's Audience Chamber Scene 2 -- Ulrica's Cave Act II -- A clearing in a lonely forest Act III, Scene 1 -- A room in Renato's Mansion Scene 2 -- A room in the Royal Palace Scene 3 -- The Royal Ballroom Notes Corps de Ballet