Messe I.X–VI.X is the ninth studio album by the Norwegian experimental electronica band Ulver, created in collaboration with the Tromsø Chamber Orchestra with additional aid from composer Martin Romberg.

It was composed and first performed live by Ulver, alongside the Tromsø Chamber Orchestra on September 21, 2012.

The band then took the recordings back to Crystal Canyon, Oslo and spent winter and spring in post-production, honing the material for its studio-equivalent.

Six compositions altogether written and produced, recorded and mixed by Ulver, this time consisting of Ole Alexander Halstensgård, Kristoffer Rygg, Jørn H. Sværen and Tore Ylwizaker, with additional aid and advice from composer Martin Romberg who also arranged the music for the 21 members of Tromsø Chamber Orchestra.

The song itself has a distinct Middle Eastern feel to it and coupled with sounds of vultures and war that title seemed both appropriate as well as contemporary.

"[14] Gregory Burkart, writing for Fearnet, described Messe I.X–VI.X as "one of the band's most surreal and haunting projects to date, combining their unorthodox soundscapes (which often incorporate elements of electronic music, metal, rock and folk instrumentation, blended through inventive production techniques) with a full symphony orchestra.

"[16] Robert Dłucik, writing for Polish online magazine Rock Area, gave Messe I.X–VI.X a 10/10 rating.