Tuba mirum is a part of the Dies irae, a Latin poetic sequence used in Anglican and Catholic liturgies, especially the Requiem Mass.
Tuba mirum may also refer to:
Musical compositions Requiem (Berlioz) War Requiem (Britten) Requiem (Dvořák) Requiem (Henze) Requiem (Mozart) Polish Requiem (Penderecki) Requiem (Schnittke); see Requiem Canticles (Stravinsky) Requiem (Verdi) Messa per Rossini (a collective work by 13 composers)
Other A musical instrument invented by the composer and parodist Peter Schickele