How does Tom Wolfe use imagery in I Am Charlotte Simmons?

Imagery:

"The Dupont campus ... The moon had turned the university's buildings into a vast chiaroscuro of dark shapes brought out in all their sumptuousness by a wash of pale white gold. The towers, the turrets, the spires, the heavy slate roofs-all of it ineffably beautiful and ineffably grand. Walls thick as a castle's! It was a stronghold."