LEGO Antikythera Mechanism (from Scott Z. the Antikythera Mechanism was built in Greece at around 100 BCE, lost for 2000 years, and recovered from a shipwreck in 1901. this astronomical clock determines the positions of celestial bodies with extraordinary precision, and is now a fully-functional replica made out of LEGO.)
http://www.youtube.com/watch?v=RLPVCJjTNgk&fmt=18