There are at least 5 NUN. A) An electropop band from Poland, B) An Emocore band from the Basque Country, C) A hip hop artist from Chicago, Il, D) a dark synth group from Melbourne, Australia featuring members of Constant Mongrel and Woollen Kits, E) An alias of the italian philosopher and experimental musician Ezio Albrile

A) Nun is an electropop band from Poland.
Their members are Magdalena Kaspryszyn and Olaf Karbowiak. They deliver synthpop danceable music with a lot of uptempo songs, like their first single "Hope", released in March, 2006. Their first album is "Sunlight", and it has been published in 2006. They have signed with the swedish label Substream. Official website: http://www.nunelectro.com

B) Nun (Basque Country) Nun is an Emocore band from the Basque Country.
They released a demo in 2003 and the first album in 2006 (Collage). It was selected among the best 10 Basque albums of 2006 by the magazine Mondo Sonoro. They publish under a Creative Commons License so both works can be downloaded from: http://www.jamendo.com/us/artist/nun/ Official Website: http://www.nunsarean.com/

C) Nun is a hip hop project of Charles Lee, who resides in Chicago, Il. His first EP has yet to be released. Nun began his/her journey in 2011 with his first single "And So It Begins".
http://charlesleeartist.wordpress.com/

E) NUN is the alias of the italian philosopher and experimental musician Ezio Albrile. He released a 7" single in 1984, and appeared in a few tape compilations of known industrial noise labels of the same period. His entire output was compiled on CDr format, titled Neuronale, and released in 2011 by Maurizio Bianchi's menstrualrecordings.
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