A shortened version of this work was presented on January 31, 1970, as an inaugural lecture for the completion of the habilitation at the Faculty of Philosophy of the University of Bonn. I have already provided a brief overview of the iconographic connections discussed here in my article "Kruzifixus," in the Lexicon of Christian Iconography, edited by Engelbert Kirschbaum, Volume 2, Freiburg 1970, pages 677-695, where further material on the history of baroque crucifix iconography can also be found. I would like to express my gratitude to Dr. Antje Middeldorf-Kosegarten, Miss Elisabeth Schröter, and Dr. Aron Andersson, Professor Dr. Hans Belting, Professor Dr. Erich Dinkler, Professor Dr. Herbert von Einem, Professor Dr. Leopold D. Ettlinger, Professor Dr. Hubert Jedin, Professor Dr. Georg Kauffmann, Dr. Johannes Langner, and Dr. Traugott Vogel for their guidance and assistance.