"Ordo Ad Chao" is the fourth studio album by the Norwegian black metal band Mayhem, released on April 23, 2007, under Season Of Mist. This album marks a significant return for the band, known for their influential role in the black metal genre. With a total of eight tracks, "Ordo Ad Chao" showcases Mayhem's distinctive sound characterized by aggressive instrumentation, haunting melodies, and complex song structures. The album continues to explore themes typical of Mayhem's work, including darkness and existentialism, while incorporating elements of both rock and metal. Notable tracks include "Wall of Water" and "Voces Ab Alta," which exemplify the band's ability to blend raw energy with intricate composition. "Ordo Ad Chao" has been noted for its production quality, capturing the raw essence of Mayhem while delivering a polished sound that appeals to both long-time fans and newcomers. With its release, Mayhem solidified their legacy in the metal scene, demonstrating their evolution as artists and their commitment to pushing the boundaries of black metal.