Newgrange

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 85 metres (279 ft) wide at its widest point[10] and 12 metres (39 ft) high, and covers 4,500 square metres (1.1 acres) 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),[11] 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;[12] 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.[13] 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 or thereabouts. Most archaeologists suggest that they were added later, during the Bronze Age, centuries after the original monument had been abandoned as a ritual centre.

Newgrange contains various examples of graphic Neolithic rock art carved onto its stone surfaces.[14] 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.[15] 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."[16] 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.[17]

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.[18] 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 original complex of Newgrange was built between c. 3200 and 3100 BC.[19] According to carbon-14 dates,[20] it is approximately five hundred 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.[21] Some put its period of construction somewhat later, at 3000 to 2500 BC.[22] 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.[23] Most of the 547 slabs that make up the inner passage, chambers, and the outer kerbstones are greywacke. Some or all of them may have been brought from sites approximately 5 km away,[24] 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.[24] The stones may have been transported to Newgrange by sea and up the River Boyne by fastening them to the underside of boats at low tide.[25][26] 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.[23] The granite basins found inside the chambers also came from the Mournes.[24]

Frank Mitchell suggested that the monument could have been built within a space of five years, basing his estimation upon the likely number of local inhabitants during the Neolithic and the amount of time they could have devoted to building it rather than farming. This estimate, however, was criticised by Michael J. O'Kelly and his archaeological team, who believed that it would have taken a minimum of thirty years to build.[27]

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.[28] 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.[29] 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.[30] 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.[31]

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. The man was distantly related to people buried in the Carrowkeel and Carrowmore tombs.[32][33] 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.[34]

During much of the Neolithic period, the Newgrange area continued to be a focus of some ceremonial activity.

Sunlight entering the chamber around the time of the winter solstice

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."[35] 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.[35]

Studies in other fields of expertise offer alternative interpretations of the possible functions, however, which principally centre on the astronomy, engineering, geometry, and mythology associated with the Boyne monuments. It is speculated that the sun formed an important part of the religious beliefs of the Neolithic people who built it. One idea was that the room was designed for a ritualistic capturing of sun rays on the shortest day of the year, the Winter Solstice, as the room gets flooded with sunlight, which might have signaled that the days would start to get longer again. This view is strengthened by the discovery of alignments in Knowth, Dowth, and the Lough Crew Cairns leading to the interpretation of these monuments as calendrical or astronomical devices.

Formerly, the Newgrange mound was encircled by an outer ring of immense standing stones, of which twelve of a possible thirty-seven remain. Evidence from carbon dating suggests that the stone circle which encircled Newgrange may not be contemporary with the monument however, but was placed there some 1,000 years later in the Bronze Age. 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. This research implies a continuity of use of Newgrange of over a thousand years; with partial remains found from only five individuals, some question the tomb theory for its purpose. In June 2020, evidence of incest from the remains of a body buried in Newgrange was found. This led to speculation that incest may have been carried out to maintain a "dynastic bloodline", thus pointing to Newgrange as a tomb for the elites.[36]

Once a year, at the Winter Solstice, the rising sun shines directly along the long passage, illuminating the inner chamber and revealing the carvings inside, notably the triple spiral on the front wall of the chamber. This illumination lasts for approximately 17 minutes.[5] Michael J. O'Kelly was the first person in modern times to observe this event on 21 December 1967.[37] 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.[38]) 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.[39] 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.

Gold jewellery from Roman times deposited at the mound (British Museum)

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".[40] These people were adherents of the Beaker culture, which had been imported from mainland Europe, and made Beaker-style pottery locally.[40] A large timber circle (or henge) was built to the southeast of the main mound and a smaller timber circle to the west. The eastern timber circle consisted of five concentric rows of pits. The outer row contained wooden posts. The next row of pits had clay linings and was used to burn animal remains. The three inner rows of pits were dug to accept the animal remains. Within the circle were post and stake holes associated with Beaker pottery and flint flakes. The western timber circle consisted of two concentric rows of parallel postholes and pits defining a circle 20 metres (66 ft) in diameter. A concentric mound of clay was constructed around the southern and western sides of the mound that covered a structure consisting of two parallel lines of post and ditches that had been partly burnt. A free-standing circle of large stones was raised around the Newgrange mound. Near the entrance, seventeen hearths were used to set fires. These structures at Newgrange are generally contemporary with a number of henges known from the Boyne Valley, at Newgrange Site A, Newgrange Site O, Dowth Henge, and Monknewtown Henge.

The site evidently continued to have some ritual significance into the Iron Age. Among various objects later deposited around the mound are two pendants made from gold Roman coins of 320–337 AD (now in the National Museum of Ireland) and Roman gold jewellery including two bracelets, two finger rings, and a necklace, now in the collections of the British Museum.[41]

The entrance to Newgrange in the late 1800s, when the mound had become largely overgrown

In 1699, a local landowner, 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).[54] Soon another antiquarian visitor, Sir Thomas Molyneaux, professor at the University of 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.[55] 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.[56]

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,[57] 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.[58] 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.[59]

The entrance to Newgrange in the early 1900s, after much of the debris had been cleared

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.[60] 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.[61] In the 1950s, electric lighting was installed in the passageway to allow visitors to see more clearly,[62] whilst an exhaustive archaeological excavation was undertaken from 1962 through to 1975, the excavation report of which was written by Michael J. O'Kelly and published in 1982 by Thames and Hudson as Newgrange: Archaeology, Art and Legend.[63]

Following the O'Kelly excavation, further restoration and reconstruction took place at the site. Based on the positions of the cobblestones, and after conducting experiments, O'Kelly concluded that they had made up a retaining wall, but had fallen from the face of the mound. As part of the restoration, this wall was "rebuilt" and the cobblestones were fixed into a near-vertical steel-reinforced concrete wall surrounding the front of the mound. This work is controversial among the archaeological community. P. R. Giot described the monument as looking like a "cream cheese cake with dried currants distributed about."[64] Neil Oliver described the reconstruction as "a bit brutal, a bit overdone, kind of like Stalin does the Stone Age".[65] Critics of the new wall claim that the technology to fix a retaining wall at this angle did not exist when the mound was created.[66][67]

Another theory is that some, or all, of the white quartz cobblestones had formed a plaza on the ground at the entrance. This theory was preferred at nearby Knowth, where the restorers laid the quartz stones out as an "apron" in front of the entrance to the great mound.[68]

The inward-curving dark stone walls on each side of the entrance are not original, nor are they intended to suggest Newgrange's original appearance, but were designed solely to facilitate visitor access. A visitor guide book to the site, however, has a reconstruction drawing depicting Neolithic inhabitants using Newgrange that shows the modern entrance as if it were part of Newgrange's original appearance.[69]

The culture that built Newgrange is sometimes confused with the much later Celtic culture, and designs on the stones are misdescribed as "Celtic".[70] However, recent archaeogenetics suggests that the west European neolithic population was largely replaced by later arrivals.[71]