<P> Archaeologists believe it was constructed from 3000 BC to 2000 BC . The surrounding circular earth bank and ditch , which constitute the earliest phase of the monument , have been dated to about 3100 BC . Radiocarbon dating suggests that the first bluestones were raised between 2400 and 2200 BC , although they may have been at the site as early as 3000 BC . </P>
<P> Archaeologists believe it was constructed from 3000 BC to 2000 BC . The surrounding circular earth bank and ditch , which constitute the earliest phase of the monument , have been dated to about 3100 BC . Radiocarbon dating suggests that the first bluestones were raised between 2400 and 2200 BC , although they may have been at the site as early as 3000 BC . </P>
when were the first stones put up at stonehenge
when were the first stones put up at stonehenge
between 2400 and 2200 BC
between 2400 and 2200 BC