This sculpture at CIA headquarters holds one of the world’s most famous unsolved mysteries

(CNN)In the middle of CIA headquarters, there sits a sculpture that contains a secret code that has stumped top cryptologists for decades.

In the late 1980s, artist Jim Sanborn was commissioned to create a sculpture to be displayed at CIA headquarters in Langley, Virginia. Knowing some of the world’s top intelligence officials would see the piece practically every day, Sanborn made a work of art that is, in a word, puzzling.

Unveiled on November 3, 1990, it’s called Kryptos, and it contains a cryptographic challenge. Surely, someone would crack the code in just a couple of weeks, Sanborn thought.

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