Archaeologists believe that Stonehenge was built in several stages.History.com states “First Neolithic Britons used primitive tools...to dig a massive circular ditch and bank,or henge, on Salisbury Plain.”Scholars believe these ditches may have held a timber posts at one time.Then the second phase of stonehenge began,builders hoisted 80 bluestones but only half remain today.During the third stage they added sandstone to the outside