Why did the Statue of Liberty change color?
Within its first 15 years in New York Harbor, the Statue of Liberty went from a bright copper color to a dull, darker brown hue. By 1903, people began noticing that Lady Liberty had started gradually developing a green patina, says Wortel-London, who specializes in the history of New York City. This color change was occurring because the copper covering the statue was exposed to the elements—like air, salt water and pollution—and began to oxidize. According to Wortel-London, there was no expectation that the statue would turn green over time. In fact, Bartholdi reportedly thought that it was going to turn a darker red.
In 1906, there were calls to repaint the statue to restore it to its original copper. Congress even appropriated $62,000 for the job. But the project was abandoned amid protests that painting the Statue of Liberty would be "sacrilege," according to a newspaper report at the time. Plus, as Wortel-London points out, if they painted the statue and wanted to keep it looking fresh, they’d have to repaint it every 25 or so years.
By 1910, the statue was half copper-colored and half blue-green. A decade later, its transformation to a fully green hue was complete—and there was no going back.
“As more and more people grew up with the statue looking green, it became less and less relevant to try to restore it to an older hue,” Wortel-London says. “This is particularly the case with the symbolism of the Statue of Liberty as an immigrant entrepôt [entry point]. I don't think people were interested in seeing it returned to a Gilded Age, pre-immigration, copper color.”
But there is also a practical reason to leave the bluish-green patina—also known as “verdigris”—alone: It protects the metal underneath from corroding and degrading. As Wortel-London says, “It's basically adding a slight extra layer to the original material.”