Royal Swedish Opera architect Carl Fredrik Adelcrantz was commissioned by King Gustav III, a strong adherent of the ideal of an enlightened absolutism and as such was a great patron of the arts. The Swedish Opera company had first been located in Bollhuset, but there was a need to separate the Opera from the theatre and give them separate buildings. Construction began in 1775 and the theatre was inaugurated on 30 September 1782 with a performance of the German composer Johann Gottlieb Naumann's "Cora och Alonzo". It was also the place for public masquerade balls, events inspired from the famous opera-balls in Paris,
Giuseppe Verdi and third nights, the reception improved considerably). With Strepponi, Verdi went to Naples early in January 1858 to work with Somma on the libretto of the opera "Gustave III", which over a year later would become "Un ballo in maschera". By this time, Verdi had begun to write about Strepponi as "my wife" and she was signing her letters as "Giuseppina Verdi". Verdi raged against the stringent requirements of the Neapolitan censor stating: "I'm drowning in a sea of troubles. It's almost certain that the censors will forbid our libretto." With no hope of seeing his "Gustavo III" staged as