Stonehenge
is a megalithic
edifice located near
Amesbury on England’s Salisbury
Plain. The structure is composed of a series of large stones arranged
in a circular
pattern surrounded by an inner bank and shallow ditch. The site itself
is listed with UNESCO and is a national legally protected Scheduled Ancient
Monument
managed by English Heritage.
[1]
Today, however, the mists are clearing, modern
archaeological techniques providing us with a more accurate insight
into the monument's past, careful analysis of the findings revealing
its secrets, carbon dating revealing its age. It
appears that Stonehenge was not built all at once but was instead
completed in a series of changes, modifications and additions that took
place over many centuries.
Evidence
indicates that stone
replaced timber around 2600 BC and that holes were dug in the center
area to hold bluestones brought from the Prescelly Mountains (Preseli
Hills) of Wales. A huge
block of green sandstone from the Brecon Beacons became known as the
Alter Stone. Other modifications included a widening of the
northeastern entrance in order to make it line up precisely with the
sunrise of midsummer and sunset of midwinter. For some reason the
bluestones were then removed and the holes filled in. A pair of
parallel ditches connecting with the River Avon was added as were the
Heel Stone and Station Stones.