Starting in the last quarter of the 1st century BCE (reign of Augustus) and over a period of two centuries (reign of Philip the Arab), the Romans had built a temple complex in Baalbek consisting of three temples: Jupiter, Bacchus and Venus. On a nearby hill, they built a fourth temple dedicated to Mercury.
The original number of Jupiter columns was 54 columns. The architrave and frieze blocks weigh up to 60 tons each, and one corner block over 100 tons, all of them raised to a height of 19 m (62.34 ft) above the ground.
This was thought to have been done using Roman cranes. Roman cranes were not capable of lifting stones this heavy; however, by combining multiple cranes they may have been able to lift them to this height. If necessary they may have used the cranes to lever one side up a little at a time and use shims to hold it while they did the other side.