09/03/2026
🤔 Thursday Thoughts — Why Did the Sculpture Turn Green?
Yesterday we revealed the sculpture outside the Princeton Public Library—but did you notice its beautiful green coloring?
That color wasn’t painted on. It developed naturally over time.
When metals containing copper, including brass and bronze, are exposed to air and moisture, their surface gradually reacts with the environment. This creates a layer called a patina.
Unlike flaky iron rust, a stable patina can actually help protect the metal underneath. It also gives older sculptures their distinctive shades of green, blue, brown, and turquoise. In a way, the weather becomes part of the artwork.
And this is one of the joys of exploring Princeton on foot or by bicycle: we move slowly enough to notice details we might miss through a car window—the texture of a sculpture, the inscription on a plaque, an architectural detail, or a small piece of local history hiding in plain sight.
The next time you walk or bike past the library, pause for a moment and look at the sculpture up close. You may notice something you’ve never seen before.
💬 What interesting Princeton detail have you discovered while walking or biking?
