Featuring several members from the Finnish extreme metal scene (including famous Jari Mäenpää, ex-Ensiferum and Wintersun frontman), Arthemesia formed in 1994, working their way up the ladder via a couple of demos before their 2001 debut release, Devs - Iratvs.
In 2009 they released their second full-length album, a.O.a, or Alpha Omega Alpha. Musically it strays from their first album, with traditional heavy metal, (melodic) black metal, black 'n' roll, darkwave and jazz all playing a part in the arrangements, whilst still keeping an aggressive black metal front.