The Baalbek Megaliths
Unknown pre-Roman foundation; Roman temple 1st century BCE – 3rd century CE
The Roman Temple of Jupiter at Baalbek, Lebanon, sits on a foundation platform containing three of the largest stone blocks ever used in construction — the Trilithon — each weighing between 800 and 1,000 tonnes. In the nearby quarry lies the Stone of the South, an unfinished block weighing 1,650 tonnes — the largest known worked stone in the world. No one has ever explained how these blocks were moved and placed.