"This work, which features Martin Luther's portrait, first appeared in Latin and was directed against Catholic sacramental teaching. Of the seven sacraments, Luther considered only baptism and communion, and to some degree, confession, sacraments of Christ. In the case of communion, he rejected the notions that it was a sacrifice to God and that the elements are transformed (transubstantiation)."
Martin Luther, Von dem babylonischen Gefängnis der Kirche
(On the Babylonian Captivity of the Church). Wittenberg, 1520,