On the Architecture of Shadows
A winter visit to the Padua observatory reveals what mechanical timekeeping quietly erased
The sundial in the east cloister of the Padua observatory has measured nothing but sunlight since 1763. Its limestone face, now greyed by two and a half centuries of Venetian rain, still holds the carved motto its maker chose: HORAS NON NUMERO NISI SERENAS — I count only the sunny hours. When I stood before it last December, the gnomon’s shadow fell just past the seventh hour line, and I understood for the first time what it meant to read time from the earth rather than from a machine.