First, Oskar Gottlieb Blarr planned the organ editing of Penderecki 's Agnus Dei from the Polish Requiem as a private homage to the esteemed master. Meanwhile, the piece has also been successfully performed by other organists, whoproved the organ performance of the poignant Agnus Dei sustainable. As in his other organ works, Blarr followed strict criteria: the strict maintenance of intervals, postures, articulation and phrasing.