substruction

Strabo describes it as standing upon a lofty substruction of white stone, and shaded up to the top with trees.

It was wide and solidly built, resting on the Roman substruction, and covered by a platform on vaulting.

All the rectangular stones of the substruction are of white marble.

The remains are interesting, though they do little more than show perfectly the substruction and plan of the ancient building.

The substruction of this temple, which has been laid bare, consists of tufa cased with travertine.