We all know how to use a computer, but who believed that tey existed 2000 years ago? The Antikythera Mechanism, a system of bronze gears from the 2nd century B.C., was used to calculate the date of the Olympic Games based on the summer solstice. Its mechanical complexity was unequalled for 1,000 years, until the cathedral clocks of the Middle Ages in Europe.
Professor Michael Edmunds of Cardiff University who led the most recent study of the mechanism said: "This device is just extraordinary, the only thing of its kind. The design is beautiful, the astronomy is exactly right. The way the mechanics are designed just makes your jaw drop. Whoever has done this has done it extremely carefully ... in terms of historic and scarcity value, I have to regard this mechanism as being more valuable than the Mona Lisa."

Read more here
http://en.wikipedia.org/wiki/Antikythera_mechanism
Professor Michael Edmunds of Cardiff University who led the most recent study of the mechanism said: "This device is just extraordinary, the only thing of its kind. The design is beautiful, the astronomy is exactly right. The way the mechanics are designed just makes your jaw drop. Whoever has done this has done it extremely carefully ... in terms of historic and scarcity value, I have to regard this mechanism as being more valuable than the Mona Lisa."

Read more here
http://en.wikipedia.org/wiki/Antikythera_mechanism
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