Baalbek, Lebanon, is the scene of another of the funny anomalies involving gravity in the ancient world. At the temple of Jupiter at Baalbek, and also in a nearby quary, are found carved stone blocks which are simply too heavy to be moved by any modern technology and, hence also one would assume, by any ancient technology. The only assumption which works, as noted also in the case of the large dinosaurs, is that gravity was simply not the problem then which it is now.
Baalbek