In the Court of the Crimson King

In the Court of the Crimson King (subtitled An Observation by King Crimson) is the debut studio album by English progressive rock band King Crimson, released on 10 October 1969, by Island Records. Often regarded as the first true progressive rock album, it combined rock music influences with elements of jazz, classical, and symphonic music while describing the devastating effects of war and conflict, societal alienation and disillusionment, the perceived futility of human efforts against powerful, corrupt forces, unchecked authority and corrupt leadership.

Source: Wikipedia — In the Court of the Crimson King (CC BY-SA 4.0)