- Formed in Winter 1994 AB by Routa and Valtias and a couple of other musicians under the name Celestial Agony
- With new members joining the musical and ideological entity the name changed into ArthemesiA in 1996 AB
- First demo was unleashed in 1998 AB and the first rip-off recording deal offered by the infamous Unisound Records
- Also in 1998 AB Mor Voryon, Mor Vethor and Arbaal joined ArthemesiA, thus renewing the whole band
- 1999 AB came the second Demo assault, named The Archaic Dreamer
- ArthemesiA entered the Hellhole Studios in Winter 2000 AB to record the debut album Devs – Iratvs. Soon after recording the debut, ArthemesiA signed a recording deal with Norwegian Native North Records. CD was quickly sold out and was highly praised as one of the best sympho-BM debut albums ever made
- At this time ArthemesiA did few live rituals with some guests like Trollhorn of Moonsorrow and Finntroll fame
- Magistra Nocte joins the band in 2001 AB
- In 2002 AB co-founder Routa left the band and Mor Voryon switched Bass to Guitars
- At the same year Promon 02AB came out as NNR went in bankruptcy and ArthemesiA needed a new recording deal yet again
- 2003 AB ArthemesiA signed a deal with a Dutch rip-off label Karmageddon Media, formerly known as Hammerheart Records. Luckily enough, during the sessions of ShamaNatahS – II Describe I Mind ArthemesiA was forced to change their drummer so no second album was ever made
- As Karmageddon Media was not able to fulfill their part of the deal, ArthemesiA released ShamaNatahS – Promon 06AB in 2006AB with three new songs and some of the Promon 02AB tracks. It was also the time for Arbaal to leave the band
- Drummer Erzebeth Meggadeath joined the band at this time as well
- In 2007 AB Valtias and Mor Voryon recorded The Hyperion Elements promo-CD, which presents the new ArthemesiA including completely different approach to music, ideology and Magic
- S.M. NekroC was introduced to the band
-2008 AB ArthemesiA signed a new deal... more information coming soon
