A Night at the Opera is the seventh studio album by the German power metal band Blind Guardian, released in 2002.

[4] This album continues a stylistic change from power metal into a more progressive sound, with multiple overlaid vocals, choirs, orchestral keys and guitar leads and less emphasis on powerful guitar riffs and heavy rhythms.

[6] There are seven different studio versions and two official live versions of "Harvest of Sorrow" – two in English, two in Spanish ("Mies Del Dolor", "La Cosecha Del Dolor"), one in Italian ("Frutto Del Buio"), one in French ("Moisson de Peine"), and one in a mix of all of the versions except the English acoustic and Italian (also called "Harvest of the World").

The song "Battlefield" is featured as the music in the heavy metal edition of the Adult Swim game Robot Unicorn Attack.

All lyrics are written by Hansi Kürsch; all music is composed by André Olbrich and Kürsch, except bonus tracks by Marcus Siepen, Kürsch and Thomen StauchThe album features the concepts and themes familiar to Blind Guardian fans, such as historical battles and religious references.