What do “parergonal” and "parergon" mean in the following sentence? Can anybody suggest some synonym?
Thus, the figurative signification of structure does not escape but instead confirms the parergonal and supplemental status of ornament. If structure in its metaphorical sense is the fully conceived structured idea of the building, then ornament becomes the parergon that reifies the underlying essential idea, the recessive unseen structure. (Source: "Structure/ornament and the Modern Figuration of Architecture" by Anne-Marie Sankovitch)
I checked them out in American Heritage Online English dictionary and Wikipedia, but I wasn't able to figure it out, and I'm struggling because I'm actually not able to understand what Anne-Marie Sankovitch said.