Composer Giacomo Puccini Librettists Luigi Illica and Giuseppe Giacosa Based On the drama La Tosca by Victorien Sardou Company San Francisco Opera Association Location San Francisco, CA Venue Civic Auditorium Season 1926 Language Italian Creative/Crew Conductor Gaetano Merola Stage Director(s) Armando Agnini Cast Floria Tosca Claudia Muzio Mario Cavaradossi Antonio Cortis Baron Scarpia Marcel Journet Spoletta Lodovico Oliviero Sacristan Vittorio Trevisan Angelotti Antonio Nicolich Sciarrone Antonio Nicolich Jailer Evaristo Alibertini Shepherd Hazel Huff Show Dates Mon, Oct 4 1926, 8pm Time and Place Rome Scenes Act I -- Interior of church of St. Andrea, Rome Act II -- Scarpia's offices in the Farnese Palace Act III -- Battlements of the Prison Notes The 8 p.m. starting time is a guess; the bound program volumes didn't include this particular opera.