Spiegel im Spiegel is a piece of music written by
Arvo Pärt in 1978, just prior to his departure from
Estonia. The piece is in the
tintinnabular style of composition, wherein a
melodic voice, operating over
diatonic scales, and
tintinnabular voice, operating within a
triad on the
tonic, accompany each other. It is about ten minutes long.