The religious subject matter of Triptychon is most likely a reference to the biblical scene of the three Marys at the foot of the Cross: The Assumption of the Virgin with two angels (center), surrounded by her sister Mary with a shroud on the ground (left) and probably Mary Magdalene watching over Christ's empty tomb (right). Resembling a winged altarpiece, this work is one of Kerkovius’ late masterpieces. Kerkovius uses a colorful palette and her figural compositions are religiously permeated, revealing the influence of her teacher Hölzel, with whom she remained in close contact throughout her life.