Question: When did the Amesbury Archer get buried?
About the article "Stonehenge", section "Function and construction".

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Amesbury is a town and civil parish in Wiltshire, England.
It is most famous for the prehistoric monument of Stonehenge which is in its parish, and for the discovery of the Amesbury Archer—dubbed the King of Stonehenge in the press—in 2002.
It has a population of 8,907.
The 2011 census recorded 32,874 in the wider Amesbury area, with just under 11,000 in Amesbury itself, a growth largely due to recent housing development coinciding with the creation Solstice Park, a business park on the A303 road.
Eleanor of Provence, queen of England, died in Amesbury on 24/25 June 1291, and was buried in Amesbury Abbey. 
Amesbury has 4 main schools: The Stonehenge School, a specialist maths and Computing comprehensive school Amesbury Church of England Voluntary Controlled Primary School Christ the King RC Primary School Amesbury Archer Primary School  
The Stonehenge Archer is the name given to a Bronze Age man whose body was discovered in the outer ditch of Stonehenge.
Unlike most burials in the Stonehenge Landscape, his body was not in a barrow, although it did appear to have been deliberately and carefully buried in the ditch.
Examination of the skeleton indicated that the man was local to the area and aged about 30 when he died.
Radiocarbon dating suggests that he died around 2300 BCE, making his death roughly contemporary with the Amesbury Archer and the Boscombe Bowmen buried 3 miles away in Amesbury.
He came to be known as an archer because of the stone wrist-guard and a number of flint arrowheads buried with him.
In fact, several of the arrowheads' tips were located in the skeleton's bones, suggesting that the man had been killed by them.
His body was excavated in 1978 by Richard Atkinson and John G. Evans who had been re-examining an older trench in the ditch and bank of Stonehenge.
His remains are now housed in the Salisbury and South Wiltshire Museum in Salisbury. 
The Amesbury Archer is an early Bronze Age man whose grave was discovered during excavations at the site of a new housing development in Amesbury near Stonehenge.
The grave was uncovered in May 2002, and the man is believed to date from about 2300 BC.
He is nicknamed "the Archer" because of the many arrowheads that were among the artefacts buried with him.
The calibrated radiocarbon dates for his grave and dating of Stonehenge suggest the sarsens and trilithons at Stonehenge may have been raised by the time he was born, although a new bluestone circle may have been raised at the same time as his birth. 
Ancient and medieval history.
The land around Amesbury has been settled since prehistoric times, evidenced by the monument of Stonehenge.
Other finds in the parish point to large scale prehistoric structures and settlements in the whole area, including the numerous monuments around Stonehenge, the discovery of a Neolithic village in the neighbouring parish of Durrington by the Stonehenge Riverside Project, and continuing excavations at Boscombe Down where Wessex Archaeology found the Amesbury Archer and Boscombe Bowmen.
They are now on display at Salisbury and South Wiltshire Museum.
During the Iron Age a large hill fort now known as Vespasian's Camp was built alongside the Avenue and overlooking the River Avon.
The fort could easily have catered for up to 1000 people, and was probably surrounded by smaller settlements and farming communities.
Roman remains are poorly documented at Amesbury, but excavations have revealed Roman structures in the Stonehenge Landscape, and Wessex Archaeology have discovered a large Roman graveyard in the area of the Amesbury Archer burial.
It is likely that there was a large Anglo Roman settlement overlooking the River Avon at this point.
It has been suggested that the name of Amesbury is derived from Ambrosius Aurelianus, leader of Romano British resistance to Saxon invasions in the 5th century.
If this is the case he is likely to have used the hill fort as a stronghold.
It is possible that an order of monks established a monastery in the area that was destroyed by the Saxons before they settled the area in the 7th century.
Amesbury is also associated with the Arthurian legend: the convent to which Guinevere retired was said to have been the one at Amesbury.
In 979 AD a Benedictine abbey, the Abbey of St Mary and St Melor, was founded on what may have been the site of a previous monastery by Dowager Queen Ælfthryth.
In 1177 the abbey was dissolved by Henry II and replaced with a double priory of the Fontevrault order.
Eleanor of Provence was buried in the abbey on 11 September 1291.
At some point in time it seems likely that the church became the parish church, and it is possible that this is why it was spared destruction in 1540 when, as part of the reformation, the priory and all other associated buildings were destroyed.
Amesbury became an estate and was given to Edward Seymour, 1st Earl of Hertford by the crown.
On John Speed's map of Wiltshire (1611), the town's name is spelt both "Amesbury" (for the hundred) and "Ambersbury" (for the town itself).