Oskar Gottlieb Blarr first planned this organ transcription of Penderecki's Agnus Dei from the "Polish Requiem" as a private homage to the esteemed master. The piece has since been frequently performed by other organists, proving the validity of this transcription. As in his other organ works, Blarr followed strict criteria: the strict maintenance of intervals, postures, articulation and phrasing.