Wolpert, Andrew, Eschenbach and Michelangelo, in Forward, William, Wolpert, Andrew, The Quest for the Grail, The Golden Blade, 47, Floris Books, Edinburgh, 1994, 60-74

Frauenfiguren:

Pietà-Symbolik:

Sigune:

Steiner, Rudolf (Anthroposophie): , 138,9 (61), 249,11 (61), 435,10 (61), 804,19 (62)