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Neolithic monument in County Meath, Ireland

Newgrange (Sí an Bhrú) is a prehistoric monument in County Meath in Ireland, located on a rise overlooking the River Boyne, west of the town of Drogheda. It is an exceptionally grand passage tomb built during the Neolithic Period, around 3200 BC, making it older than Stonehenge and the Egyptian pyramids. Newgrange is the main monument in the Brú na Bóinne complex, a World Heritage Site that also includes the passage tombs of Knowth and Dowth, as well as other henges, burial mounds and standing stones. Newgrange consists of a large circular mound with an inner stone passageway and cruciform chamber. Burnt and unburnt human bones, and possible grave goods or votive offerings, were found in this chamber. The monument has a striking façade made mostly of white quartz cobblestones, and it is ringed by engraved kerbstones. Many of the larger stones of Newgrange are covered in megalithic art. The mound is also ringed by a stone circle. Some of the material that makes up the monument came from as far as the Mournes and Wicklow Mountains. There is no agreement about its purpose, but it is believed it had religious significance. It is aligned so that the rising sun on the winter solstice shines through a "roofbox" above the entrance and floods the inner chamber. Several other passage tombs in Ireland are aligned with solstices and equinoxes, and Cairn G at Carrowkeel has a similar "roofbox". Newgrange shares similarities with some other Neolithic monuments in Western Europe; especially Gavrinis in Brittany, which has a similar preserved facing and large carved stones, Maeshowe in Orkney, with its large corbelled chamber, and Bryn Celli Ddu in Wales. Its initial period of use lasted about 1,000 years. Newgrange then gradually became a ruin, although the area continued to be a site of ritual activity. It featured in Irish mythology and folklore, in which it is said to be a dwelling of the deities, particularly The Dagda and his son Aengus. Antiquarians first began its study in the seventeenth century, and archaeological excavations began in the twentieth century. Archaeologist Michael J. O'Kelly led the most extensive of these from 1962 to 1975 and also reconstructed the front of the monument, a reconstruction that is controversial. This included an inward curving dark stone wall to ease visitor access. Newgrange is a popular tourist site and, according to archaeologist Colin Renfrew, is "unhesitatingly regarded by the prehistorian as the great national monument of Ireland" and as one of the most important megalithic structures in Europe.

The Newgrange monument primarily consists of a large mound, built of alternating layers of earth and stones, with grass growing on top and a reconstructed facade of flattish white quartz stones studded at intervals with large rounded cobbles covering part of the circumference. It consists of about 200,000 tonnes of material. The mound is wide at its widest point and high, and covers of ground. Within the mound is a chambered passage, which may be accessed by an entrance on the southeastern side of the monument. The passage stretches for 19 metres (60 ft), or about a third of the way into the centre of the structure. At the end of the passage are three small chambers off a larger central chamber with a high corbelled vault roof. Each of the smaller chambers has a large flat "basin stone" where the bones of the dead may have been deposited during prehistoric times. Whether it was a burial site remains unclear. The walls of this passage are made up of large stone slabs called orthostats, twenty two of which are on the western side and twenty one on the eastern side. They average 1½ metres in height; several are decorated with carvings (as well as graffiti from the period after the rediscovery). The orthostats decrease in height the further into the passageway as a result of the passage being slightly graded from being constructed on the rise of a hill. The ceiling shows no evidence of smoke.

Situated around the perimeter of the mound is a circle of standing stones. Twelve standing stones survive out of a possible original thirty five. Most archaeologists suggest that they were added later, during the Bronze Age, centuries after the original monument had been abandoned as a ritual centre. This view is disputed and relates to a carbon date from a standing stone setting that intersects with a later timber post circle, the theory being, that the stone in question could have been moved and later, re set in its original position.

Newgrange contains various examples of graphic Neolithic rock art carved onto its stone surfaces. These carvings fit into ten categories, five of which are curvilinear (circles, spirals, arcs, serpentiniforms, and dot in circles) and the other five of which are rectilinear (chevrons, lozenges, radials, parallel lines, and offsets). They are marked by wide differences in style, the skill level needed to produce them, and on how deeply carved they are. One of the most notable types of art at Newgrange are the triskele like features found on the entrance stone. It is approximately three metres long and 1.2 metres high (10 ft long and 4 ft high), and about five tonnes in weight. It has been described as "one of the most famous stones in the entire repertory of megalithic art." Archaeologists believe that most of the carvings were produced prior to the stones being erected, although the entrance stone was carved in situ before the kerbstones were placed alongside it. Various archaeologists have speculated as to the meanings of the designs, with some, such as George Coffey (in the 1890s), believing them to be purely decorative, whilst others, such as O'Kelly, believed them to have some sort of symbolic purpose, because some of the carvings had been in places that would not have been visible, such as at the bottom of the orthostatic slabs below ground level. Extensive research on how the art relates to alignments and astronomy in the Boyne Valley complex was carried out by American Irish researcher, Martin Brennan.

The Neolithic people who built the monument were native agriculturalists, growing crops and raising animals such as cattle in the area where their settlements were located.

The original complex of Newgrange was built between c. 3200 and 3100 BC. According to carbon 14 dates, it is approximately 500 years older than the current form of Stonehenge and the Great Pyramid of Giza in Egypt, as well as predating the Mycenaean culture of ancient Greece. Some put its period of construction somewhat later, at 3000 to 2500 BC. Geological analysis indicates that the thousands of pebbles that make up the cairn, which together would have weighed about 200,000 tonnes, came from the nearby river terraces of the Boyne. There is a large pond in this area that is believed to be the site quarried for the pebbles by the builders of Newgrange. from the rocky beach at Clogherhead, County Louth, about 20 km to the northeast. The facade and entrance were built with white quartz cobblestones from the Wicklow Mountains, about 50 km to the south; dark rounded granodiorite cobbles from the Mourne Mountains, about 50 km to the north; dark gabbro cobbles from the Cooley Mountains; and banded siltstone from the shore at Carlingford Lough. None of the structural slabs were quarried, for they show signs of having been weathered naturally, so they must have been collected and then transported, largely uphill, to the Newgrange site. The granite basins found inside the chambers also came from the Mournes.

Excavations have revealed deposits of both burnt and unburnt human bone in the passage, indicating human corpses had been placed within it, some of whom had been cremated. From examining the unburnt bone, it was shown to come from at least two separate individuals, but much of their skeletons were missing, and what was left had been scattered about the passage. Various grave goods were deposited alongside the bodies inside the passage. Excavations that took place in the late 1960s and early 1970s revealed seven "marbles", four pendants, two beads, a used flint flake, a bone chisel, and fragments of bone pins and points. Many more artifacts had been found in the passage in previous centuries by visiting antiquarians and tourists, although most of these were removed and went missing or held in private collections. Nonetheless, sometimes these were recorded and it is believed that the grave goods that came from Newgrange were typical of Neolithic Irish passage grave assemblages. The remains of animals also have been found in the structure, primarily those of mountain hares, rabbits, and dogs, but also of bats, sheep, goats, cattle, song thrushes, and more rarely, molluscs and frogs. Most of these animals would have entered and died in the chamber many centuries or even millennia after it was constructed: for instance, rabbits were only introduced to Ireland in the thirteenth century. DNA analysis found that bones deposited in the most elaborate chamber belonged to a man whose parents were first degree relatives, possibly brother and sister. In history, such inbreeding was usually only found in royal dynasties headed by "god kings", such as the pharaohs of ancient Egypt, who married among themselves to keep the royal bloodline "pure". This, together with the prestige of the burial, could mean that a similar elite group were responsible for building Newgrange, and that it was a royal tomb. The man was distantly related to people buried in the Carrowkeel and Carrowmore tombs. However, archaeologist Alasdair Whittle said that social difference in the Neolithic was often short lived, speculating that an elite may have arisen temporarily in response to crisis. He suggested that Newgrange may have been a communal monument at certain times and co opted as a personal tomb for brief periods.

There have been various debates as to its original purpose. Many archaeologists believed that the monument had religious significance of some sort or another, either as a place of worship for a "cult of the dead" or for an astronomically based faith. O'Kelly believed that the monument had to be seen in relation to the nearby Knowth and Dowth, and that the building of Newgrange "cannot be regarded as other than the expression of some kind of powerful force or motivation, brought to the extremes of aggrandizement in these three monuments, the cathedrals of the megalithic religion." O'Kelly believed that Newgrange, alongside the hundreds of other passage tombs built in Ireland during the Neolithic, showed evidence for a religion that venerated the dead as one of its core principles. He believed that this "cult of the dead" was just one particular form of European Neolithic religion, and that other megalithic monuments displayed evidence for different religious beliefs that were solar oriented, rather than ancestor oriented. The sunlight enters the passage through a specially contrived opening, known as a roofbox, directly above the main entrance. Although solar alignments are not uncommon among passage graves, Newgrange is one of few to contain the additional roofbox feature. (Cairn G at Carrowkeel Megalithic Cemetery is another, and it has been suggested that one can be found at Bryn Celli Ddu.) The alignment is such that although the roofbox is above the passage entrance, the light hits the floor of the inner chamber. Today the first light enters about four minutes after sunrise and strikes the middle of the chamber, but calculations based on the precession of the Earth show that 5,000 years ago, first light would have entered exactly at sunrise and shone on the chamber's back wall. The solar alignment at Newgrange is very precise compared to similar phenomena at other passage graves such as Dowth or Maes Howe in the Orkney Islands, off the coast of Scotland. During much of the Neolithic period, the Newgrange area continued to be a focus of some ceremonial activity.

By the onset of the Bronze Age, it appears that Newgrange was no longer being used by the local population, who did not leave any artifacts in the structure or bury their dead there. O'Kelly stated, "by 2000 [BC] Newgrange was in decay and squatters were living around its collapsing edge". These people were adherents of the Beaker culture, which had been imported from mainland Europe, and made Beaker style pottery locally. The culture that built Newgrange is sometimes confused with the much later Celtic culture, and designs on the stones are misdescribed as "Celtic". However, recent archaeogenetics suggests that the west European neolithic population was largely replaced by later arrivals.

In Irish mythology, Newgrange is often called Síd in Broga (modern Sídhe an Brugha or Sí an Bhrú). Like other passage tombs, it is described as a portal to the Otherworld and a dwelling of the divine Tuatha Dé Danann. In one tale the Dagda, the chief god, desires Boann, the goddess of the River Boyne. She lives at Brú na Bóinne with her husband Elcmar. The Dagda impregnates her after sending Elcmar away on a one day errand. To hide the pregnancy from Elcmar, the Dagda casts a spell on him, making "the sun stand still" so he will not notice the passing of time. Meanwhile, Boann gives birth to Aengus, who is also known as Maccán Óg ("the young son"). Eventually, Aengus learns that the Dagda is his true father and asks him for a portion of land. In some versions of the tale, the Dagda helps Aengus take ownership of the Brú from Elcmar. Aengus asks to have the Brú for "a day and night", but then claims it forever, because all time is made up of "day and night". Other versions have Aengus taking over the Brú from the Dagda himself by using the same trick. The Brú is then named Brug maic ind Óig after him. In The Pursuit of Diarmuid and Gráinne, Aengus takes Diarmuid's body to the Brú. It has been suggested that this tale represents the winter solstice illumination of Newgrange, during which the sunbeam (the Dagda) enters the inner chamber (the womb of Boann) when the sun's path stands still. The word solstice (Irish grianstad) means sun standstill. The conception of Aengus may represent the "rebirth" of the sun at the winter solstice, him taking over the Brú from an older god representing the growing sun taking over from the waning sun. This could mean that knowledge of the event survived for thousands of years before being recorded as a myth in the Middle Ages. This tale has also been linked with recent DNA analysis, which found that a man buried at Newgrange had parents who were most likely siblings (see #Construction and burials). Newgrange is described in some myths as "white topped", "brilliant to approach", and "chequered with many lights". Archaeologist Claire O'Kelly wrote that these could be "references to the glistening white quartz of the Newgrange mound". Local folklore about Newgrange survived into the modern era.

Sometime after 1142 the structure became part of outlying farmland owned by the Cistercian Abbey of Mellifont. These farms were referred to as "granges". Newgrange is not mentioned in any of the early charters of the twelfth and thirteenth centuries, but an Inspeximus granted by Edward III in 1348 includes a Nova Grangia among the demesne lands of the abbey.

In 1699, the local landowner, Williamite settler Charles Campbell, ordered some of his farm labourers to dig up a part of Newgrange, which then had the appearance of a large mound of earth, so that he could collect stone from within it. The labourers soon discovered the entrance to the tomb within the mound, and a Welsh antiquarian named Edward Lhwyd, who was staying in the area, was alerted and took an interest in the monument. He wrote an account of the mound and its tomb, describing what he saw as its "barbarous sculpture" and noting that animal bones, beads, and pieces of glass had been found inside of it (modern archaeologists have speculated that these latter two were in fact the polished pottery beads that subsequently have been found at the site and that were a common feature of Neolithic tombs). Soon another antiquarian visitor, Sir Thomas Molyneux, professor at Trinity College Dublin, also came to the site. He talked to Charles Campbell, who informed him that he had found the remains of two human corpses in the tomb, one (which was male) in one of the cisterns and another farther along the passageway, something that Lhwyd had not noted. Subsequently, Newgrange was visited by a number of antiquarians, who often performed their own measurements of the site and made their own observations, which often were published in various antiquarian journals; these included such figures as Sir William Wilde, Thomas Pownall, Thomas Wright, John O'Donovan, George Petrie, and James Ferguson. These antiquarians often concocted their own theories about the origins of Newgrange, many of which have since been proved incorrect. Thomas Pownall conducted a very detailed survey of New Grange in 1769, which numbers all the stones and also records some of the carvings on the stone and asserted that the mound originally had been taller and a lot of the stone on top of it had been removed, a theory that has been disproven by archaeological research. The majority of these antiquarians also refused to believe that it was ancient peoples native to Ireland who built the monument, with many believing that it had been built in the early medieval period by invading Vikings, whilst others speculated that it had been built by the ancient Egyptians, ancient Indians, or the Phoenicians. At some time in the early 1800s, a folly was built a few yards behind Newgrange. The folly, with two circular windows, was made of stones taken from Newgrange.

In 1882, under the Ancient Monuments Protection Act, Newgrange and the nearby monuments of Knowth and Dowth were placed under the control of the state with the Board of Public Works being the responsible administrative authority. In 1890, under the leadership of Thomas Newenham Deane, the board began a project of conservation of the monument, which had been damaged through general deterioration over the previous three millennia as well as the increasing vandalism caused by visitors, some of whom had inscribed their names on the stones. In subsequent decades, a number of archaeologists performed excavations at the site, discovering more about its function and how it had been built; however, even at the time, it was still mistakenly believed by archaeologists to be built during the Bronze Age rather than during the earlier Neolithic period. For 60 years in the late nineteenth and early twentieth century Annie (d. 1964) and Bob Hickey looked after Newgrange as caretakers, custodians and tour guides following his appointment c. 1890. They spoke of noticing a shaft of sunlight hitting a particular stone inside during the winter equinox in December. In the 1950s, electric lighting was installed in the passageway to allow visitors to see more clearly. The first thorough archaeological investigation and excavation of Newgrange was undertaken from 1962 through to 1975, led by Irish archaeologist Michael J. O'Kelly. Following the O'Kelly excavation, conservation, restoration and reconstruction works took place, based on the archaeological findings. His excavation report was published in 1982 by Thames and Hudson as Newgrange: Archaeology, Art and Legend. A dense layer of white quartz stones, mingled with grey cobbles, was found lying at the front of the mound. O'Kelly's team carefully recorded the stratigraphy. The quartz layer was thickest nearest the kerbstones, and none was found underneath any of the kerbstones that had fallen or tilted outward from the mound. This indicated that the quartz had fallen or slipped down from above the kerbstones. O'Kelly concluded that the quartz had made up a white façade or revetment on the front of the monument. The archaeologists also found what they believed to be the bottom course of a revetment, still in place above three kerbstones at the back of the mound. The height of the original façade was calculated as being up to 3 meters tall by civil engineer John Fogarty of University College Cork, an expert on the movement of piled up loose materials. Fogarty and O'Kelly's team tested their theory by building and collapsing a façade made of the same kind of quartz and cobble stones. O'Kelly wrote that the resulting stratigraphy was almost identical to that found in the excavations. As part of the restoration, this white quartz façade was rebuilt, and a concrete support wall built behind it in case of a future cairn collapse. This work is controversial among the archaeological community. P. R. Giot described the façade as looking like a "cream cheese cake with dried currants distributed about". Neil Oliver described the reconstruction as "a bit brutal, a bit overdone, kind of like Stalin does the Stone Age". Some critics claim that the Neolithic builders did not have the technology to build a revetment at this angle. Other archaeologists have supported O'Kelly's conclusions and the reconstructed façade, such as Robert Hensey and Elizabeth Shee Twohig in their paper "Facing the cairn at Newgrange" (2017), where they set forth the archaeological evidence. They also contend that if the builders quarried and brought the quartz such a distance, they likely would have used it to "maximum effect" as a striking façade, rather than laying it on the ground where it could barely be seen. Hensey and Twohig note that passage tombs in Brittany have similar near vertical dry stone fronts, such as Gavrinis and Barnenez. In 2016, archaeologist Michael Gibbons controversially claimed that the roofbox, which captures the winter solstice sunlight, was "fabricated" by O'Kelly's team. This claim was refuted by several prominent Irish archaeologists, including Prof William O'Brien and Ann Lynch, who noted that it has been recorded photographically since the early 1900s, and in detailed site drawings from the excavation.

Newgrange is located west of Drogheda in County Meath. The interpretive centre is located on the south bank of the river and Newgrange is located on the north side of the river. Access is only from the interpretive centre. Access to Newgrange is by guided tour only. Tours begin at the Brú na Bóinne Visitor Centre from which visitors are taken to the site in groups. Current day visitors to Newgrange are treated to a guided tour and a re enactment of the Winter Solstice experience through the use of high powered electric lights situated within the tomb. The finale of a Newgrange tour results in every visitor standing inside the tomb where the tour guide then turns off the lights, and then turns on ones simulating the sunlight that would appear on the winter solstice. To experience the phenomenon on the morning of the Winter Solstice from inside Newgrange, visitors to Bru Na Bóinne Visitor Centre must enter an annual lottery at the centre. Of the tens of thousands who enter, sixty are chosen each year. Winners are permitted to bring a single guest. The winners are split into groups of ten and taken in on the five days around the solstice in December when sunlight can enter the chamber, weather permitting. Due to the COVID 19 pandemic, however, the 2020 and 2021 events were exclusively live streamed with no public access.