Question

The late twentieth-century restoration of the Sistine Chapel ceiling was initially heralded as a triumph of modern conservation science. Armed with advanced chemical solvents, restorers systematically stripped away centuries of accumulated soot, candle grease, and animal-hide glue, revealing a remarkably vibrant palette beneath. The restorers believed that their methodology, grounded in rigorous chemical analysis, eliminated the subjectivity that had plagued earlier restoration efforts. Proponents of the intervention argued that this process was fundamentally objective: by removing external accretions, science was simply uncovering Michelangelo's unadulterated original intent. In their view, the bright, almost garish colors that emerged were the true frescoes, long obscured by the ravages of time.

However, this purportedly objective enterprise rests on a highly questionable premise regarding the techniques of Renaissance fresco painters. Critics of the restoration suggest that the dark layers removed were not entirely accidental accumulations of grime, but rather an intentional *a secco* (dry) patina applied by Michelangelo himself. To understand the gravity of this potential error, one might consider the nineteenth-century "cleaning" of Rembrandt's *The Night Watch*. In that instance, restorers, convinced that the painting's dark amber cast was merely aged varnish, scrubbed the canvas down to its primary layers. They succeeded in making the painting brighter, but irreversibly destroyed the subtle glazes Rembrandt had meticulously layered to create his signature chiaroscuro effect, flattening the composition and destroying its illusion of depth.

Similarly, the chemical solvents used on the Sistine ceiling did not discriminate between nineteenth-century dirt and sixteenth-century finishing glazes. By treating any substance not chemically identical to the base plaster and pigment as an impurity to be eradicated, the restorers prioritized a sanitized, scientific definition of "original" over a historically informed understanding of the artist's methodology. The removal of the glue layer—which likely served to harmonize the vivid underpainting and model the figures in shadow—has left the frescoes arguably brighter, but fundamentally altered, possessing a startling two-dimensionality that contradicts Michelangelo's renowned sculptural approach to painting. Thus, relying exclusively on chemical analysis to dictate restoration policy risks permanently erasing the very masterpieces such efforts are ostensibly designed to preserve.

Which one of the following most accurately describes the author's rhetorical strategy in referencing the nineteenth-century "cleaning" of Rembrandt's *The Night Watch* in the second paragraph?