1992-The Finnish Black Metal band was formed in summer as a five piece band under the name of SIGILLUM DIABOLI. The first demo "Descent into Hell" was released in November.
1993-The band played their only gig in January. Later three members left/were kicked out of the band.
1994-"Demo II" was released in June. Line up was:Pete-guitars,bass,drums and Grimn`r-vocals.
1995-In the summer the bands name was changed to DIABOLI,and later Pete parted ways with Grimn`r (vocals). In the autumn Pete recorded the first album "Mesmerized by Darkness".
1996-Debut album "Mesmerized by Darkness" was released by UNISOUND RECORDS (Greece) in the summer.
1997-In October Pete signed DIABOLI to American label FULL MOON PRODUCTIONS for two albums.
1998-Second album "Towards Damnation" was released by FMP in January. The third album "Anthems of Sorrow" was recorded during the autumn. Vocals for this album were done by Grimn`r.
1999-In the beginning of December Pete was arrested and charged with an attempt to kill a man with an axe. Later he was found guilty,and was sentenced to four years and six months in prison.
2000-Third album "Anthems of Sorrow" was released in September by FMP. This year Grimn`r went to prison too for a few months because of some violence charges. The whole band was behind bars for a while.
2001-In June Grimn`r (vocals) committed suicide.
2002-Pete got out of prison in March. In September a Finnish label NORTHERN HERITAGE RECORDS released a limited edition (500 copies) 7"ep "Descent into Hell". The ep includes two songs from the first demo,which are re-recorded in 1999.
2003-Fourth album "Unseen Age of War" was released in July by NORTHERN HERITAGE RECORDE. The album includes 12 unreleased tracks and both demos.
2004-Fifth album "Kirous" was released in October by NORTHERN HERITAGE RECORDS.
2006-Sixth album "The Antichrist" was released in October by NORTHERN HERITAGE RECORDS.
2008-Vinyl versions (500 copies) of "Kirous" and "The Antichrist" were released in March by NORTHERN HERITAGE.
2010-Seventh album "Invocation" was released in April by NORTHERN HERITAGE. CD and LP (500 copies).
2014-In October three first albums were reissued on tape by NORTHERN HERITAGE.
2015-Eight album "Wiking Division" was released on CD by NORTHERN HERITAGE in June.