Maskarade (Masquerade) is an opera in three acts by Carl Nielsen to a Danish libretto by Vilhelm Andersen, based on the comedy by Ludvig Holberg.

Reviews in the press were however mixed, the consensus being that the first act was the best, the second was rather weak and the third lacked theatrical clarity although the music was brilliant.

Now considered to be Denmark's national opera, it has enjoyed lasting success in the country, attributable to its many strophic songs, its dances and its underlying "old Copenhagen" atmosphere.

[10] The story revolves around Leander and Leonora, two young people who meet fortuitously at a masquerade ball, swear their undying love for each other and exchange rings.

He becomes distraught when reminded by Henrik that his parents have betrothed him in marriage to Leonora, the daughter of Leonard from remote Slagelse.

As part of the celebrations of the 150th anniversary of Carl Nielsen's birth, the Royal Theatre in Copenhagen staged eleven well-received performances of Maskarade from March to May 2015.