The builders of Stonehenge completed their design by raising a large timber building at the center. They must have done this befor building Stonehenge II, the stone-holes of which cut into and destroy many of its post-holes, but after they made the ditch, band and Aubrey Holes of Stonehenge I; the true circles formed by these large -scale features of the first Stonehenge can only have been marked out at a time when the central precienct was completely clear except perhaps for a post or totem pole at the very center.