All Prehistoric Stone Monuments

Monuments raised from large stones before writing, such as the circles of standing stones at Stonehenge and the passage tomb of Newgrange beside the River Boyne. A monument belongs here when the cited article calls it prehistoric or describes standing stones. It excludes the monuments of literate civilizations. The group follows the description the cited article gives. Both are Neolithic or Bronze Age works whose builders left no written record, and both are aligned to the movements of the sun, so scholars use the shapes and positions of the stones to study what the builders knew of the sky.