Ossian D'Ambrosio (born 18 September 1970 as Luigi 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 (transl. Italian Druidic Circle) 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.