A Night at the Opera, named after a Marx Brothers film, is considered one of the greatest albums of all time. It is exceptional in every respect, from its music to its lyrics and artistic quality. Queen combined the strongest elements of their two previous albums to create their best work. The album, the most expensive ever recorded at the time, blends elements of rock, opera, heavy metal, romantic song, ballads, pop, folk science fiction, music hall, trad jazz, and even the national anthem.