Mustis may also refer to the ancient Roman city of Musti (Tunisia).

Mustis, the pseudonym

Pseudonym

A pseudonym is a name that a person assumes for a particular purpose and that differs from his or her original orthonym...

 of Øyvind Johan Mustaparta, born 10 September 1979, who is a Norwegian

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 keyboardist

Keyboardist

A keyboardist is a musician who plays keyboard instruments. Until the early 1960s musicians who played keyboards were generally classified as either pianists or organists. Since the mid-1960s, a plethora of new musical instruments with keyboards have come into common usage, requiring a more...

 best known for his work in the symphonic black metal

Symphonic black metal

Symphonic black metal is a black metal subgenre that emerged in the mid to late 1990s. The genre is known for its symphonic and orchestral elements and is centralized in Europe.-Characteristics:...

 band Dimmu Borgir

Dimmu Borgir

Dimmu Borgir is a Norwegian black metal band from Oslo, Norway, formed in 1993. Dimmu borgir means "dark cities" or "dark castles/fortresses" in Icelandic, Faroese and Old Norse. The name is derived from a volcanic formation in Iceland, Dimmuborgir...

. Mustis joined Dimmu Borgir in 1998 and contributed to their atmosphere with his melodic keyboard parts. This can be heard in songs such as "Progenies of the Great Apocalypse

Progenies of the Great Apocalypse

"Progenies of the Great Apocalypse" is a song by the Norwegian symphonic black metal band Dimmu Borgir. It served as their debut single on the album Death Cult Armageddon...

," which he composed, on their 2003 album, Death Cult Armageddon

Death Cult Armageddon

-Band members:*Shagrath – vocals*Silenoz – rhythm guitar*Galder – lead guitar*ICS Vortex – bass, clean vocals on tracks 2 & 7*Mustis – grand piano & synth*Nicholas Barker – drums-Guests:* Abbath – vocals on tracks 2 & 11...

. His other studio work with Dimmu Borgir includes Spiritual Black Dimensions

Spiritual Black Dimensions

-Personnel:Dimmu Borgir*Shagrath - lead vocals*Silenoz - rhythm guitar*Astennu - lead guitar*Nagash - bass, backing vocals*Tjodalv - drums*Mustis - synthesizers, pianoGuests*ICS Vortex - clean vocals on tracks 1,3,7,9*Peter Tagtgren - Engineering and mix...

(1999), Puritanical Euphoric Misanthropia

Puritanical Euphoric Misanthropia

-Band members:*Shagrath – lead vocals, synthesizers*Silenoz – rhythm guitar*Galder – lead guitar*ICS Vortex – bass, clean vocals on tracks 3, 4, 8, 10 & "Burn In Hell" *Nicholas Barker – drums*Mustis – synthesizers, piano-Guests:...

(2001), and the re-release of Stormblåst

Stormblåst

-Personnel:*Silenoz – lead vocals, lead guitar*Shagrath – rhythm guitar, vocals*Tjodalv – drums*Brynjard Tristan – bass*Stian Aarstad – synthesizers, piano...

(2005) and In Sorte Diaboli

In Sorte Diaboli

In Sorte Diaboli is Norwegian symphonic black metal band Dimmu Borgir's eighth studio album, released in 2007. It is the band's first concept album. A site on the Nuclear Blast website was created for In Sorte Diaboli, in which a new promotional photo can be seen and an audio sample can be heard...

(2007). Mustis departed the band in 2009 and issued a statement in which he implied that he was being kept out of the proper registration for music he was writing. Due to this, according to his statement, he was fired by text message and he will be allowing "the resolution come from the lawyers instead of dealing with more dishonesty and lies on a one-on-one personal level."

Mustis' surname Mustaparta comes from Finnish language

Finnish language

Finnish is the language spoken by the majority of the population in Finland Primarily for use by restaurant menus and by ethnic Finns outside Finland. It is one of the two official languages of Finland and an official minority language in Sweden. In Sweden, both standard Finnish and Meänkieli, a...

. Literally translated, it means "black beard."

On November 29, 2010, Mustis posted the following statement on his Facebook fan page. "As you all can see I have no control over this site yet, but will try to get it soon as possible. If not..keep your eyes open for a new one. And thanks everyone for all the nice words in here.
As you can see I decided to join my friends of Susperia where my first performance will be early next year. More info to come. In the... meantime you can always use google translate.
-Mustis"