Piazza della Signoria was designed as an open-air Hermetic theater. Ammannati's Fountain of Neptune features a colossal white marble statue of Neptune (symbolizing liquid transformation and maritime mastery), surrounded by bronze sea nymphs and satyrs. The placement of the fountain aligns with the shadow ray cast by the Palazzo Vecchio tower at solar solstice.
The full decipherment and its observational protocol — where to stand, when, and what to watch for — are in the Florence field codex.