By chance, does anyone here know experimentally verified methods

>>3347888
I don't think it was ever definitively proven how the Ancient Egyptians did it, but when the Romans moved a couple of the obelisks away from Egypt to what's now Italy, they did it by the following.

>Tie a bunch of ropes to the obelisk
>Have a huge number of people yank it down on top of some rollers.
>Drag it to the Nile
>Have a boat waiting.
>Fill boat with sand so it sinks
>Is now lower than the obelisk, so it can be dragged onto the boat.
>Obelisk is now in sunken boat.
>Send in lots of guys to haul all of the fucking sand back out.
>Boat slowly rises.
>Sail on your way to Rome.
>Same roller trick to move it where you want it.
>Tip it up.

Bear in mind though, these were smaller ones, "only" 2-500 tons. But I imagine you could do something similar with just more muscle power for a larger one.

I always assumed the second one listed >>3347949