New research, which includes a reconsideration of buried archaeological evidence, shows the layout on Stonehenge to have been based on mirrored symmetry. True it was set up to acknowledge the direction of the midwinter sunset, but otherwise all the stones relate only to each other - in near perfect geometric relationships. It was carefully planned (on the equivalent of a prehistoric drawing board) and largely prefabricated. We might note for example that the centers of the inner faces of the Circle are set to the vertices of a near perfect 30 ?gon (triacontagon). For further information see 'Solving Stonehenge'.