Stratum is the second full-length studio album by the Norwegian Christian extreme metal band Drottnar, initially released on October 13, 2012 through Endtime Productions.

A single was released for the album, "Lucid Stratum", on November 8, 2011, and the band went on a four-stop tour with Deuteronomium and Pantokrator in Finland from May 2–5, 2013.

The album features a highly technical and complex form of extreme metal, and met with a positive reception from critics.

The band recorded and released two demos, Doom of the Antichrist and A White Realm, both of which were re-mastered and re-released as a compilation, Spiritual Warfare, in 2000.

[4] Around the time of Welterwerk's release, the band members started wearing early 20th century military regalia in mockery of Nazi and Communist regimes.

[4] André Gabriel of Metal.de described the music as "extreme", melding black metal with a "weird", progressive style, and noted the many tempo changes and intricate song structures.

[17] Radio show MLWZ wrote that on the album, Drottnar brings together "elements of technical, black, death, industrial, avant-garde and just about every form of extreme metal one can think of".