Мегалиты: Древние каменные сооружения и памятники.

Large stone used to build a structure or monument

A megalith is a large stone that has been used to construct a prehistoric structure or monument, either alone or together with other stones. There are over 35,000 in Europe alone, located widely from Sweden to the Mediterranean sea. The word was first used in 1849 by the British antiquarian Algernon Herbert in reference to Stonehenge and derives from the Ancient Greek words "mega" for great and "lithos" for stone. Most extant megaliths were erected between the Neolithic period (although earlier Mesolithic examples are known) through the Chalcolithic period and into the Bronze Age.

While "megalith" is often used to describe a single piece of stone, it also can be used to denote one or more rocks hewn in definite shapes for special purposes. It has been used to describe structures built by people from many parts of the world living in many different periods. The most widely known megaliths are not tombs.

Menhir Menhir is the name used in Western Europe for a single upright stone erected in prehistoric times; sometimes called a "standing stone". Monolith Any single standing stone erected in prehistoric times. Capstone style Single megaliths placed horizontally, often over burial chambers, without the use of support stones.

7400 BC: A 12 m long monolith probably weighing around 15,000 kg found submerged 40 m under water in the Strait of Sicily south west of Sicily. Its origin and purpose are unknown.

2500 BC: Constructions in Brittany (Le Menec, Kermario and elsewhere), Italy (Otranto), Sardinia, and Scotland (northeast), plus the climax of the megalithic Bell beaker culture in Iberia, Germany, and the British Isles (stone circle at Stonehenge). With the bell beakers, the Neolithic period gave way to the Chalcolithic, the age of copper. 2500 BC: Tombs at Algarve, Portugal. Additionally, a problematic dating (by optically stimulated luminescence) of Quinta da Queimada Menhir in western Algarve indicates "a very early period of megalithic activity in the Algarve, older than in the rest of Europe and in parallel, to some extent, with the famous Anatolian site of Göbekli Tepe"
c. 2400 BC: The Bell beaker culture was dominant in Britain, and hundreds of smaller stone circles were built in the British Isles at this time.

2100 BC:The highest plateau Lampung, West Lampung Regency, Batu Brak Liwa, Indonesia Megalith Site.

2000 BC: Constructions in Brittany (Er Grah), Italy : (Bari); Sicily (Cava dei Servi, Cava Lazzaro);, and Scotland (Callanish). The Chalcolithic period gave way to the Bronze Age in western and northern Europe. 1800 BC: Constructions in Italy (Giovinazzo, in Sardinia started the nuragic civilisation). 1500 BC: Constructions in Portugal (Alter Pedroso and Mourela). 1400 BC: Burial of the Egtved Girl in Denmark, whose body is today one of the best preserved examples of its kind. 1200 BC: Last vestiges of the megalithic tradition in the Mediterranean and elsewhere following the Bronze Age Collapse. Megalithic construction persisted in Egypt into the Iron Age.

The most common type of megalithic construction in Europe is the portal tomb—a chamber consisting of upright stones (orthostats) with one or more large flat capstones forming a roof. Many portal tombs have been found to contain human remains, but it is debated if their primary function was use as burial sites. The megalithic structures in the northwest of France are believed to be the oldest in Europe based on radiocarbon dating. Though generally known as "dolmens", the term most accepted by archaeologists is "portal tomb". Local names for portal tombs exist in multiple locations, such as anta in Galicia and Portugal, stazzone in Sardinia, hunebed in the Netherlands, Hünengrab in Germany, dysse in Denmark, and cromlech in Wales. It is assumed that most portal tombs were originally covered by earthen mounds. The second most common tomb type is the passage grave. It normally consists of a square, circular, or cruciform chamber with a slabbed or corbelled roof, accessed by a long, straight passageway, with the whole structure covered by a circular mound of earth. Sometimes it is also surrounded by an external stone kerb. Prominent examples include the sites of Brú na Bóinne and Carrowmore in Ireland, Maes Howe in Orkney, and Gavrinis in France. The third tomb type is a diverse group known as gallery graves. These are axially arranged chambers placed under elongated mounds. The Irish court tombs, British long barrows, and German Steinkisten belong to this group. Standing stones, or menhirs as they are known in France, are very common throughout Europe, where some 50,000 examples have been noted. Some of these are thought to have an astronomical function as a marker or foresight. In some areas, long and complex "alignments" of such stones exist, the largest known example being located at Carnac in Brittany, France. In parts of Britain and Ireland a relatively common type of megalithic construction is the stone circle, of which examples include Stonehenge, Avebury, Ring of Brodgar and Beltany. These, too, display evidence of astronomical alignments, both solar and lunar. Stonehenge, for example, is famous for its solstice alignment. Examples of stone circles are also found in the rest of Europe. The circle at Lough Gur, near Limerick in Ireland has been dated to the Beaker period, approximately contemporaneous with Stonehenge. The stone circles are assumed to be of later date than the tombs, straddling the Neolithic and the Bronze Ages.

Megalithic tombs are aboveground burial chambers, built of large stone slabs (megaliths) laid on edge and covered with earth or other, smaller stones. They are a type of chamber tomb, and the term is used to describe the structures built across Atlantic Europe, the Mediterranean, and neighbouring regions, mostly during the Neolithic period, by Neolithic farming communities. They differ from the contemporary long barrows through their structural use of stone. There is a huge variety of megalithic tombs. The free standing single chamber dolmens and portal dolmens found in Brittany, Denmark, Germany, Ireland, Netherlands, Sweden, Wales, and elsewhere consist of a large flat stone supported by three, four, or more standing stones. They were covered by a stone cairn or earth barrow. In Italy, dolmens can be found especially in Sardinia. There are more than 100 dolmen dating to the Neolithic (3500–2700 BC) and the most famous is called Dolmen di Sa Coveccada (near Mores). During the Bronze Age, the Nuragic civilization built c. 800 Giants' grave, a type of megalithic gallery grave that can be found throughout Sardinia with different structures. The earliest megalithic tombs in Sardinia are the circular graves of the so called Arzachena culture, also found in Corsica, southern France and eastern Spain. Dolmens are also in Apulia and in Sicily. In this latter region, they are small structures located in Mura Pregne (Palermo), Sciacca (Agrigento), Monte Bubbonia (Caltanissetta), Butera (Caltanissetta), Cava Lazzaro (Siracusa), Cava dei Servi (Ragusa), Avola (Siracusa), and Argimusco in Montalbano Elicona (Messina). Dating to the Early Bronze Age (2200–1800 BC), the prehistoric Sicilian buildings were covered by a circular mound of earth. In the dolmen of Cava dei Servi, archaeologists found numerous human bone fragments and some splinters of Castelluccian ceramics (Early Bronze Age) which confirmed the burial purpose of the artefact. Examples with outer areas, not used for burial, are also known. The Court Cairns of southwest Scotland and northern Ireland, the Severn Cotswold tombs of southwest England and the transepted gallery graves of the Loire region in France share many internal features, although the links between them are not yet fully understood. That they often have antechambers or forecourts is thought to imply a desire on the part of the builders to emphasize a special ritual or physical separation of the dead from the living. Megalithic tombs appear to have been used by communities for the long term deposition of the remains of their dead, and some seem to have undergone alteration and enlargement. The organization and effort required to erect these large stones suggest that the societies concerned placed great emphasis on the proper treatment of their dead. The ritual significance of the tombs is supported by the presence of pre historic art carved into the stones at some sites. Hearths and deposits of pottery and animal bone found by archaeologists around some tombs also implies that some form of burial feast or sacrificial rites took place there. Further examples of megalithic tombs include the stalled cairn at Midhowe in Orkney and the passage grave at Bryn Celli Ddu on Anglesey. There are also extensive grave sites with up to 60 megaliths at Louisenlund and Gryet on the Danish island of Bornholm. Despite its name, the Stone Tomb in Ukraine was not a tomb but rather a sanctuary.

In association with the megalithic constructions across Europe, there are often large earthworks of various designs—ditches and banks (like the Dorset Cursus), broad terraces, circular enclosures known as henges, and frequently artificial mounds such as Silbury Hill in England and Monte d'Accoddi in Sardinia (the prehistoric step pyramid).

In Europe megaliths are, in general, constructions erected during the Neolithic or late Stone Age and Chalcolithic or Copper Age (4500–1500 BC). The megalithic structures of Malta are believed to be the oldest in Europe. Perhaps the most famous megalithic structure is Stonehenge in England. In Sardinia, in addition to dolmens, menhirs and circular graves there are also more than 8000 megalithic structures made by a Nuragic civilisation, called Nuraghe: buildings similar to towers (sometimes with really complex structures) made using only rocks. They are often near giant's grave or the other megalithic monuments. The French Comte de Caylus was the first to describe the Carnac stones. Pierre Jean Baptiste Legrand d'Aussy introduced the terms menhir and dolmen, both taken from the Breton language, into antiquarian terminology. He mistakenly interpreted megaliths as Gallic tombs. In Britain, the antiquarians Aubrey and Stukeley conducted early research into megaliths. In 1805, Jacques Cambry published a book called Monuments celtiques, ou recherches sur le culte des Pierres, précédées d'une notice sur les Celtes et sur les Druides, et suivies d'Etymologie celtiques, where he proposed a Celtic stone cult. This unproven connection between druids and megaliths has haunted the public imagination ever since. In Belgium, there are the Wéris megaliths at Wéris, a little town situated in the Ardennes. In the Netherlands, megalithic structures can be found in the northeast of the country, mostly in the province of Drenthe. Knowth is a passage grave of the Brú na Bóinne neolithic complex in Ireland, dating from c. 3500–3000 BC. It contains more than a third of the total number of examples of megalithic art in all Europe, with over 200 decorated stones found during excavations.

Nabta Playa at the southwest corner of the western Egyptian desert was once a large lake in the Nubian Desert, located 500 miles south of modern day Cairo. By the 5th millennium BC, the peoples in Nabta Playa had fashioned an astronomical device that accurately marks the summer solstice. Findings indicate that the region was occupied only seasonally, likely only in the summer when the local lake filled with water for grazing cattle. There are other megalithic stone circles in the southwestern desert. At Nabta Playa, located in Egypt and broader region of the Eastern Sahara, there is a megalithic cultural complex (e. g., sacrificed cow burial site, solar calendar, altar) that dates between 4000 BCE and 2000 BCE. Likely part of Copper Age and Bronze Age cultural traditions of megalith building, megaliths (e. g., dolmens) were constructed in Mediterranean North Africa. Additionally, Tiya in central Ethiopia has a number of old megaliths. Some of these ancient structures feature engravings, and the area is a World Heritage Site. Megaliths are also found within the Valley of Marvels in the East Hararghe area.

In the mid 2nd millennium CE, the megalithic funerary monuments of Madagascar were constructed amid the emergent period of the Merina Kingdom. Typical estimates hover around the 30,000 mark for the entire peninsula, which in itself constitutes some 40% of all dolmens worldwide (see Dolmen).

Northeast Asian megalithic traditions originated from Gojoseon, which was in modern day Manchuria and North Korea. This was prominent within the Liao River basin in particular in the early phases. The practice of erecting megalithic burials spread quickly from the Liao River Basin and into the Korean Peninsula, where the structure of megaliths is geographically and chronologically distinct. The earliest megalithic burials are called "northern" or "table style" because they feature an above ground burial chamber formed by heavy stone slabs that form a rectangular cist. An oversized capstone is placed over the stone slab burial chamber, giving the appearance of a table top. These megalithic burials date to the early part of the Mumun pottery period (c. 1500–850 BC) and are distributed, with a few exceptions, north of the Han River. Few northern style megaliths in North Korea and Manchuria contain grave goods such as Liaoning bronze daggers, prompting some archaeologists to interpret the burials as the graves of chiefs or preeminent individuals. However, whether a result of grave robbery or intentional mortuary behaviour, most northern megaliths contain no grave goods.

Southern style megalithic burials are distributed in the southern Korean Peninsula. It is thought that most of them date to the latter part of the Early Mumun or to the Middle Mumun Period. Southern style megaliths are typically smaller in scale than northern megaliths. The interment area of southern megaliths has an underground burial chamber made of earth or lined with thin stone slabs. A massive capstone is placed over the interment area and is supported by smaller propping stones. Most of the megalithic burials on the Korean Peninsula are of the southern type. As with northern megaliths, southern examples contain few, if any, artifacts. However, a small number of megalithic burials contain fine red burnished pottery, bronze daggers, polished groundstone daggers, and greenstone ornaments. Southern megalithic burials are often found in groups, spread out in lines that are parallel with the direction of streams. Megalithic cemeteries contain burials that are linked together by low stone platforms made from large river cobbles. Broken red burnished pottery and charred wood found on these platforms has led archaeologists to hypothesize that these platform were sometimes used for ceremonies and rituals. The capstones of many southern megaliths have 'cup marks' carvings. A small number of capstones have human and dagger representations.

These megaliths are distinguished from other types by the presence of a burial shaft, sometimes up to 4 m in depth, which is lined with large cobbles. A large capstone is placed over the burial shaft without propping stones. Capstone style megaliths are the most monumental type in the Korean Peninsula, and they are primarily distributed near or on the south coast of Korea. It seems that most of these burials date to the latter part of the Middle Mumun (c. 700–550 BC), and they may have been built into the early part of the Late Mumun. An example is found near modern Changwon at Deokcheon ni, where a small cemetery contained a capstone burial (No. 1) with a massive, rectangularly shaped, stone and earthen platform. Archaeologists were not able to recover the entire feature, but the low platform was at least 56×18 m in size.

The Indonesian archipelago is the host of Austronesian and Melanesians megalith cultures both past and present. Living megalith cultures can be found on Nias, an isolated island off the western coast of North Sumatra, the Batak people in the interior of North Sumatra, on Flores and Sumba island in East Nusa Tenggara and also Toraja people from the interior of South Sulawesi. These megalith cultures remained preserved, isolated and undisturbed well into the late 19th century. Several megalith sites and structures are also found across Indonesia. Menhirs, dolmens, stone tables, and ancestral stone statues were discovered in various sites in Java, Sumatra, Sulawesi, Lesser Sunda Islands, and New Guinea. The Cipari megalith site also in West Java displays monoliths, stone terraces, and sarcophagi. Lore Lindu National Park in Central Sulawesi houses ancient megalith relics such as ancestral stone statues, mostly located in the Bada, Besoa and Napu valleys.

Megaliths in South Asia are dated before 3000 BC, with recent findings dated back to 5000 BC in southern India. Megaliths are found in almost all parts of South Asia. There is also a broad time evolution with the megaliths in central India and the upper Indus valley where the oldest megaliths are found, while those in the east also old shows evidence of continued traditions of living megalithic practices until recently. A large fraction of these are assumed to be associated with burial or post burial rituals, including memorials for those whose remains may or may not be available. The case example is that of Brahmagiri, which was excavated by Wheeler (1975) and helped establish the culture sequence in south Indian prehistory. However, there is another distinct class of megaliths that do not seem to be associated with burials. In South Asia, megaliths of all kinds are noted; these vary from menhirs, rock cut burial, chamber tomb, dolmens, stone alignment, stone circles and anthropomorphic statue figures. These are broadly classified into two (potentially overlapping) classes (after Moorti, 1994, 2008): Sepulchral (containing remains of the dead), or memorial stones where mortal remains along with funerary objects are placed; and Non sepulchral including large patterned placement of stones over a wide area. The 'non sepulchral' type is associated with astronomy and cosmology in South Asia and in other parts of the world (Menon and Vahia, 2010). In the context of prehistoric anthropomorphic figures in India, (Rao 1988/1999, Upinder Singh 2008) note that it is unclear what these giant anthropomorph statues symbolize. They usually occur in association with megalithic monuments and are located in megalithic burial grounds, and may have been connected with ancestor worship.

At a number of sites in southeastern Turkey, ceremonial complexes with large T shaped megalithic orthostats, dating from the Pre Pottery Neolithic (PPN, 9600–7000 cal BC), have been discovered. At the most famous of these sites, Göbekli Tepe, parts of the oldest level (III) have been C14 dated as far back as to the mid 10th millennium BC (cal). On this level, 20 great stone circles (up to 20 meters in diameter) with standing stones up to 7 meters high have been identified. At least 5 of these circles have so far (as of 2019) been excavated. Many of the standing stones are richly ornamented with carved reliefs of "[b]ears, boars, snakes, foxes, wildcats, aurochs, gazelle, quadruped reptiles, birds, spiders, insects, quadrupeds, scorpions" and other animals; in addition, some of the stones are carved in low profile with stylized human features (arms, hands, loincloths, but no heads). On the younger level (II) rectangular structures with smaller megaliths have been excavated. In the surrounding area, several village sites incorporating elements similar to those of Göbekli Tepe have been identified. Four of these have Göbekli Tepe's characteristic T shaped standing stones, though only one of them, Nevalı Çori, has so far been excavated. At Göbekli Tepe itself, no traces of habitation have so far been found, nor any trace of agriculture or cultivated plants, though bones of wild animals and traces of wild edible plants, along with many grinding stones, have been unearthed. It is thus assumed that these structures (which have been characterized as the first known ceremonial architecture) were erected by hunter gatherers. Göbekli Tepe's oldest structures are about 7,000 years older than the Stonehenge megaliths, although it is doubtful that any of the European megalithic traditions (see below) are derived from them. Dolmens and standing stones have been found in large areas in other parts of West Asia starting at the Turkish border in the north of Syria close to Aleppo, southwards down to Yemen. They can be encountered in Lebanon, Syria, Iran, Israel, Jordan, and Saudi Arabia. The largest concentration can be found in southern Syria and along the Jordan Rift Valley; these are threatened with destruction. They date from the late Chalcolithic or Early Bronze Age. Megaliths have also been found on Kharg Island and Pirazmian in Iran, at Barda Balka in Iraq. A semicircular arrangement of megaliths was found in Israel at Atlit Yam, a site that is now under the sea. It is a very early example, dating from the 7th millennium BC. The most concentrated occurrence of dolmens in particular is in a large area on both sides of the Jordan Rift Valley, with greater predominance on the eastern side. They occur first and foremost on the Golan Heights, the Hauran, and in Jordan, which probably has the largest concentration of dolmen in West Asia. In Saudi Arabia, only very few dolmen have been identified so far in the Hejaz. They seem, however, to re emerge in Yemen in small numbers, and thus could indicate a continuous tradition related to those of Somalia and Ethiopia. The standing stone has a very ancient tradition in West Asia, dating back from Mesopotamian times. Although not always 'megalithic' in the true sense, they occur throughout the area and can reach 5 metres or more in some cases (such as at Ader in Jordan). This phenomenon can also be traced through many passages from the Old Testament, such as those related to Jacob, the grandson of Abraham, who poured oil over a stone that he erected after his famous dream in which angels climbed to heaven (Genesis 28:10–22). Jacob is also described as putting up stones at other occasions, whereas Moses erected twelve pillars symbolizing the tribes of Israel. The tradition of venerating standing stones continued in Nabatean times. Related phenomena, such as cupholes, rock cut tombs and circles, also occur in West Asia.

Megaliths occur in many parts of Melanesia, mainly in Milne Bay Province, Fiji and Vanuatu. Few excavations has been made and little is known about the structures. The megalith tomb Otuyam at Kiriwina has been dated to be approximately 2,000 years old which indicates that megaliths are an old custom in Melanesia. However very few megaliths have been dated. The constructions have been used for different rituals. For example, tombs, sacrifices and rituals of fecundity. Dance sites exist next to some megaliths. In some places in Melanesia rituals are continued to be held at the sacred megalith sites. The fact that the beliefs are alive is a reason that most excavations have been stopped at the sites.

Megalithic structures in Micronesia reach their most developed form on the islands of Pohnpei and Kosrae in the Eastern Caroline Islands. On these two islands there was extensive use of prismatic basalt columns to build upland building complexes such as those at Salapwuk on Pohnpei and Menka on Kosrae. These building sites, remote from the ocean, appear to have been abandoned early. Megalithic building then shifted to constructing networks of artificial islands on the coast that supported a multitude of common, royal and religious structures. Dating of the structures is difficult but the complex at Nan Madol on Pohnpei was probably inhabited as early as c. 800, probably as artificial islands, with the more elaborate buildings and religious structures added to the site from 1000 to 1400 AD.

Megaliths were used for a variety of purposes ranging from serving as boundary markers of territory, being reminder of past events, to being part of the society's religion. Common motifs including crooks and axes seem to be symbols of political power, much as the crook was a symbol of Egyptian pharaohs. Amongst the indigenous peoples of India, Malaysia, Polynesia, North Africa, North America, and South America, the worship of these stones, or the use of these stones to symbolize a spirit or deity, is a possibility. In the early 20th century, some scholars believed that all megaliths belonged to one global "Megalithic culture" (hyperdiffusionism, e. g. "the Manchester school", by Grafton Elliot Smith and William James Perry), but this has long been disproved by modern dating methods. Nor is it believed any longer that there was a pan European megalithic culture, although regional cultures existed, even within such small areas as the British Isles. The archaeologist Euan Mackie wrote, "Likewise it cannot be doubted that important regional cultures existed in the Neolithic period and can be defined by different kinds of stone circles and local pottery styles (Ruggles & Barclay 2000: figure 1). No one has ever been rash enough to claim a nationwide unity of all aspects of Neolithic archaeology! ".

Much scholarship over history has suggested that Stone Age peoples moved the large stones on cylindrical wooden rollers. However, there is some disagreement with this theory, specifically as experiments have indicated that this method is impractical on uneven ground. In some contemporary megalith building cultures, such as in Sumba, Indonesia, great emphasis is placed on the social status of moving heavy stones without the relief of rollers. In the majority of documented contemporary megalithic building communities, the stones have been placed on timber sledges and dragged without rollers.

The megalithic culture of the Toraja people in the mountainous region of South Sulawesi, Indonesia dates back to around 2500–1000 BC.

In West Sumba, Indonesia, the more than 20,000 followers of the Marapu animist religion construct monolithic tombs by hand. Originally built with slave labor, the large tombs of nobles are now built by a class of dependents who are paid either in animals or cash (an amount equal to $0.65–0.90 per day). The tombs are planned long in advance, with families sometimes going into extreme debt to finance the construction. In 1971, one leading family sacrificed 350 buffalo over the course of a year in order to feed the 1,000 people necessary to drag the capstone 3 km from the quarry to the tombsite. Quarrying the stones for a tomb can take almost a month and typically involves 20–40 laborours, sometimes subcontracted by a relative. It can be months or years before the stones are actually transported to the gravesite, which is done traditionally by hand, using a wooden sled and rollers with the help of many members of the family's clan. Building the sled itself can take several days, and typically males between the ages of 10–60 are assembled to pull the stone from the quarry to the tombsite. Smaller capstones may be moved by a few hundred members of a clan, but larger ones can involve upwards of 2,000 individuals over many days. Sometimes the stones are draped with woven cloths given as gifts by relatives of the owner. The sidewalls are smaller and usually require fewer participants. The entire process is accompanied by large feasts and ritual singers provided by the owner. Some contemporary practitioners now choose to use large machinery and trucks to move the stones. Once on site, the stones were traditionally assembled and mortared with a mix of water buffalo dung and ash, but are now more commonly cemented together. Typically, the walls are assembled first, and then the capstone is incrementally elevated to the height of the walls by means of a wood scaffolding which is inserted log by log at alternating ends. Once the capstone is at the correct height beside the walls it is slid into place above the tomb. Alternately, some tombs are constructed by dragging the capstone up a fabricated ramp and then assembling the sidewalls below it, before removing the ramp structure to let the capstone rest upon the walls. Often, but not always, the finished structure is decorated by a professional stone carver with symbolic motifs. The carving alone can at times take over a month to complete.

text=And Moses wrote down all the words of the Lord. He rose early in the morning and built an altar at the foot of the mountain, and twelve pillars, according to the twelve tribes of Israel. |source=The Old Testament, Book of Exodus, 24:4 (400 BC)|author=|title=

KL Feder, "Irrationality and Popular Archaeology". American Antiquity, Vol. 49, No. 3 (July 1984), pp. 525–541. A Fleming, "Megaliths and post modernism. The case of Wales". Antiquity, 2005. A Fleming, "Phenomenology and the Megaliths of Wales: a Dreaming Too Far?". Oxford Journal of Archaeology, 1999
HJ Fleure, HJE Peake, "Megaliths and Beakers". The Journal of the Royal Anthropological Institute of Great Britain and Ireland, Vol. 60, Jan. – Jun., 1930 (Jan. – Jun., 1930), pp. 47–71. G Kubler, "Period, Style and Meaning in Ancient American Art". New Literary History, Vol. 1, No. 2, A Symposium on Periods (Winter, 1970), pp. 127–144. J McKim Malville, F Wendorf, AA Mazar, R Schild, "Megaliths and Neolithic astronomy in southern Egypt". Nature, 1998. MW Ovenden, DA Rodger, "Megaliths and Medicine Wheels". Bulletin of the American Astronomical Society, 1978
A Sherratt, "The Genesis of Megaliths". World Archaeology. 1990. (JSTOR)
A Thom, "Megaliths and Mathematics". Antiquity, 1966.