Often found in ancient cultures, characterized by huge irregular stones laid without mortar and without any form of coursing. (In Greek mythology, the Cyclopes were the three one-eyed Titans who forged thunderbolts for Zeus, or were the race of one-eyed giants descended from the Titans.) Example: Acropolis at Mycenae, Greece

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Note added at 9 mins (2006-03-15 15:21:15 GMT)
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Also please see the reference in Britannica on-line: http://www.britannica.com/eb/article-9028380?tocId=9028380&q...