| Opera (melodramma) in 3 acts Libretto: Giuseppe Giacosa and Luigi Illica [Based: Victorien Sardou: La Tosca]
 First performance: January 14, 1900, Teatro Costanzi, Roma
 
 Floria Tosca - Nadja Michael
 Mario Cavaradossi - Zoran Todorovich
 Baron Scarpia - Gidon Saks
 Cesare Angelotti - Sebastian Soules
 Spoletta - Alexander Krawetz
 Il Sagrestano - Martin Winkler
 Un Carceriere - Martin Winkler
 Sciarrone - Martin Busen
 Un Pastore - Katia Velletaz
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