A short bit of polyphony similar to typical 16th-century polyphony (Palestrina and Tallis, for example) but with a 21st-century tolerance for dissonance. The melodic "seed" is derived from Pavel Ivanovich Dolgorukov's "Halte de Caravane" (bars 11-15), which you can see at IMSPL (International Music Score Library Project, aka Petrucci Music Library).
The recording was realized by the Garritan Voices.