the 1000-ton stone still sitting in the quarry at Baalbek — somebody explain the logistics to me

Ok ancient-tech crowd, genuine question, not trying to start the aliens thing. Baalbek, Lebanon (Roman Heliopolis). In the temple podium there are three blocks, the Trilithon, ~800 tonnes each, set up off the ground in a wall. And down in the quarry 900m away there's the Stone of the Pregnant Woman,……