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,
Swedish House Mafia a month after the group's reunion at Ultra Miami 2018. The Swedish supergroup are said to have inspired many musicians in the EDM genre, most notably fellow Swedish DJs Alesso and Avicii. On April 23, 2018, three days after his death, it was revealed by Tiësto that Swedish House Mafia's Ultra Music reunion inspired Avicii to take up DJing again which saw him through his final weeks until his death on April 20. Swedish House Mafia are also credited with helping house music conquer America in the late 2000s along with the likes of Calvin Harris, Tiësto, and Carl Cox.