The Statue of Liberty is made of an iron frame with a sheet of pure copper hung over it. The torch flame now is very bright because it is coated in gold leaf instead of copper. Original flame was also coated in copper. In mid 1980s - the statue's 100th birthday, old torch was removed due to excessive damage and replaced with gold leaf torch. Old torch is placed in the monument's museum.
The true colour of the Statue of Liberty before patination was a shiny reddish brown colour. The Statue of Liberty is coated with a thin layer of copper, which turns a blue-green with age due to chemical reactions between metal and water.
The Statue of Liberty was the first lighthouse to use electric lamps. Until the restoration of 1986, the torch acted as a lighthouse for ships coming into New York Harbor.
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