Keiser Av En Dimensjon Ukjent is the third full-length album from Norwegian solo artist Mortiis, which was released in 1995. It initially came on a golden CD, whereas the LP was a picture disc wrapped in a giant poster. This album was limited to 500 numbered copies. The LP was reissued for the US by Ajna Records, with new artwork. It was limited to 300 copies, also coming with a booklet. It had previews of the then forthcoming book Secrets of My Kingdom.
On January 9th, 2007, the CD was once again reissued, this time on Projekt Records.