Mario Zeffiri is a leading interpreter of the belcanto repertoire and has been guest performing at the biggest opera houses all over the world. Teatro alla Scala, Opera di Roma, Torino, Bologna, Firenze, Trieste, Palermo, Teatro La Fenice in Venice and Teatro San Carlo in Naples are some of the most distinguished Italian theatres, where he performed. In Germany he was at the Deutsche Oper and Komische Oper Berlin, the opera houses of Frankfurt, Cologne, Düsseldorf and Leipzig, at the Staatsoper Hamburg and Semperoper Dresden. In France he sang at the Opéra de Paris-Palais Garnier, Opéra Comique, Opéra de Bordeaux, Nice, Montpellier, Toulon, Avignon; in Belgium at the Théatre Royal de La Monnaie and the Opéra Royale de Wallonie, and further in Helsinki, Moscow, St. Petersburg, Tallinn, Barcelona-Teatro Liceu, Santiago, Glasgow, Stockholm, Malta and Athens. His operatic repertoire includes more than 45 principal roles, such as Ottavio (Don Giovanni), Belmonte (Entführung aus dem Serail), Ferrando (Così fan tutte), Tamino (Zauberflöte), Tito (La Clemenza di Tito), Argirio (Tancredi), Arnold (Guillaume Tell), Ernesto (Don Pasquale), Fernando (Favorita), Edgardo (Lucia d Lamermoor), Tonio (Fille du régiment), Arturo (Puritani), Elvino (La Sonnambula), Duca di Mantova (Rigoletto), Alfredo (Traviata), Nadir (Pêcheurs de perles), Gérald (Lakmé), Léopold (La Juive), Faust (Faust & Damnation de Faust), Georges Brown (Dame Blanche), Sänger (Rosenkavalier), Narraboth (Salome), Leukippos (Daphne). Apart from all their creative universality Franz Liszt and Richard Strauss were also high-producing song composers. Among lyrical models themes of love are playing the most important role and with their multi-layered shades they also determine the presented selected works. Feeling of love as a kind of longing and passion, revelling and romantic Schwärmerei, calmness and serenity or competition and measuring yourself with somebody else-everything is based on a change of pulse and contra-pulse, "emptying yourself" and "coming to yourself", that is "giving yourself" and "receiving the other self".