Opera IX is an Italian symphonic black metal band, founded in the city of Biella by the guitarist Ossian in 1988.

Ossian D'Ambrosio, also known simply as Ossian, is an Italian heavy metal musician, organiser within modern Druidry, artisan jeweler and writer. He is the founder and leader of the Cerchio Druidico Italiano and creator of an annual Beltane festival in Biella. He plays guitar in the symphonic black metal band Opera IX, which he founded in 1988.