Keiser av en dimensjon ukjent (lit.

Emperor of a Dimension Unknown) 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.

On January 9, 2007, the CD was once again reissued, this time on Projekt Records.

The video was reissued on DVD in 2018, including a booklet of behind the scenes photography taken during filming.