Keller has had 3 concerts.

Keller is most often considered to be Heavy Metal, Thrash Metal, Jam Band, Progressive Bluegrass, Speed Metal, Jamgrass, Old School Thrash Metal, and Speed Thrash Metal.

The last Keller concert was on July 03, 2009 at Sotočje in Tolmin, Tolmin, Slovenia. The bands that performed were: Nightwish / Blind Guardian / Dragonforce / Lamb of God / Dimmu Borgir / Amon Amarth / Testament / Hatebreed / Kreator / Edguy / Sirenia / My Dying Bride / Satyricon / Napalm Death / Vader / Deathstars / Die Apokalyptischen Reiter / Sonic Syndicate / Graveworm / Sodom / Visions of Atlantis / Kataklysm / Destruction / Aborted / Death Angel / Belphegor / Alestorm / SuidakrA / Legion Of The Damned / Mystic Prophecy / Hollenthon / Keep of Kalessin / EVILE / Warbringer / Illnath / Negur Bunget / Evolve / Hellsaw / Hackneyed / Carach Angren / Stormcrow / Attica Rage / Extrema / CENTAURUS-A / Sons of Seasons / Contaminant / A New Dawn / Abstinenz / Dreamshade / Keller / Scarred / Thorns Of Ivy / Nightward / Inmate / Embryonic / Nihilo / M.O.R.A. / MoSfEt / SUFOSIA / Heretic Soul / Incubus / Always Fallen / Disease Illusion / JUST SWALLOW / D-swoon / Black Curtains / Dark Sensation / Locracy / Rude Forefathers / Amphitrium / Gonoba / Memories of Murder / Siege of Cirrha / Mordenom / Union Sundown / All Remains Insane / Radwaste / ILLUNE.