ISO/IEC 17025: History and introduction of concepts

A dolmen (/ˈdɒlmɛn/) or portal tomb is a type of single-chamber megalithic tomb, usually consisting of two or more upright megaliths supporting a large flat horizontal capstone or "table". Most date from the Late Neolithic period (4000–3000 BCE) and were sometimes covered with earth or smaller stones to form a tumulus (burial mound). Small pad-stones may be wedged between the cap and supporting stones to achieve a level appearance.^[1] In many instances, the covering has eroded away, leaving only the stone "skeleton".

In Sumba (Indonesia), dolmens are still commonly built (about 100 dolmens each year) for collective graves according to lineage. The traditional village of Wainyapu has some 1,400 dolmens.^[2]

The word dolmen entered archaeology when Théophile Corret de la Tour d'Auvergne used it to describe megalithic tombs in his Origines gauloises (1796) using the spelling dolmin (the current spelling was introduced about a decade later and had become standard in French by about 1885).^[3][4] The Oxford English Dictionary (OED) does not mention dolmin in English and gives its first citation for dolmen from a book on Brittany in 1859, describing the word as "The French term, used by some English authors, for a cromlech ...". The name was supposedly derived from a Breton language term meaning 'stone table' but doubt has been cast on this,^{[citation needed]} and the OED describes its origin as "Modern French". A book on Cornish antiquities from 1754 said that the current term in the Cornish language for a cromlech was tolmen ('hole of stone') and the OED says that "There is reason to think that this was the term inexactly reproduced by Latour d'Auvergne [sic] as dolmen, and misapplied by him and succeeding French archaeologists to the cromlech".^[5] Nonetheless it has now replaced cromlech as the usual English term in archaeology, when the more technical and descriptive alternatives are not used. The later Cornish term was quoit – an English-language word for an object with a hole through the middle preserving the original Cornish language term of tolmen – the name of another dolmen-like monument is in fact Mên-an-Tol 'stone with hole' (Standard Written Form: Men An Toll.)^[6]

In Irish Gaelic, dolmens are called Irish: dolmain.^[7]

Dolmens are known by a variety of names in other languages, including Galician and Portuguese: anta, Bulgarian: Долмени, romanized: Dolmeni, German: Hünengrab/Hünenbett, Afrikaans and Dutch: hunebed, Basque: trikuharri, Abkhaz: Adamra, Adyghe: Ispun

Danish and Norwegian: dysse, Swedish: dös, Korean: 고인돌, romanized: goindol (go-in = 'propped' + dol = 'stone'), and Hebrew: גַלעֵד. Granja is used in Portugal, Galicia, and some parts of Spain.^{[citation needed]} The rarer forms anta and ganda also appear. In Catalan-speaking areas, they are known simply as dolmen, but also by a variety of folk names, including cova ('cave'),^[8] caixa ('crate' or 'coffin'),^[9] taula ('table'),^[10] arca ('chest'),^[8] cabana ('hut'), barraca ('hut'), llosa ('slab'), llosa de jaça ('pallet slab'),^[11] roca ('rock') or pedra ('stone'), usually combined with a second part such as de l'alarb ('of the Arab'),^[9] del/de moro/s ('of the Moor/s'),^[9][12] del lladre ('of the thief'), del dimoni ('of the devil'), d'en Rotllà/Rotllan/Rotlan/Roldan ('of Roland'),.^[10][9] In the Basque Country, they are attributed to the jentilak, a race of giants.

The etymology of the German: Hünenbett, Hünengrab and Dutch: hunebed – with Hüne/hune meaning 'giant' – all evoke the image of giants buried (bett/bed/grab = 'bed/grave') there. Of other Celtic languages, Welsh cromlech was borrowed into English and quoit is commonly used in English in Cornwall.

It remains unclear when, why and by whom the earliest dolmens were made.^{[dubious – discuss]} The oldest known are found in Western Europe, dating from c. 7,000 years ago. Archaeologists still do not know who erected these dolmens, which makes it difficult to know why they did it. They are generally all regarded as tombs or burial chambers, despite the absence of clear evidence for this. Human remains, sometimes accompanied by artefacts, have been found in or close to the dolmens which could be scientifically dated using radiocarbon dating. However, it has been impossible to prove that these remains date from the time when the stones were originally set in place.^[13]

Early in the 20th century, before the advent of scientific dating, it was proposed by Harold Peake that the dolmens of western Europe were evidence of cultural diffusion from the eastern Mediterranean. This "prospector theory" surmised that Aegean-origin prospectors had moved westward in search of metal ores, starting before 2200 BCE, and had taken the concept of megalithic architecture with them.^[14]

Dolmens can be found in the Levant, some along the Jordan Rift Valley (Upper Galilee in Israel, the Golan Heights,^[15] Jordan, Lebanon, Syria, and southeast Turkey.^[16][17]

Dolmens in the Levant belong to a different, unrelated tradition to that of Europe, although they are often treated "as part of a trans-regional phenomenon that spanned the Taurus Mountains to the Arabian Peninsula."^[16] In the Levant, they are of Early Bronze rather than Late Neolithic age.^[16] They are mostly found along the Jordan Rift Valley's eastern escarpment, and in the hills of the Galilee, in clusters near Early Bronze I proto-urban settlements (3700–3000 BCE), additionally restricted by geology to areas allowing the quarrying of slabs of megalithic size.^[16] In the Levant, geological constraints led to a local burial tradition with a variety of tomb forms, dolmens being one of them.^[16]

Dolmens were built in Korea from the Bronze Age to the early Iron Age, with about 40,000 to be found throughout the peninsula.^[18] In 2000,^[18] the dolmen groups of Jukrim-ri and Dosan-ri in Gochang, Hyosan-ri and Daesin-ri in Hwasun, and Bujeong-ri, Samgeori and Osang-ri in Ganghwa gained World Cultural Heritage status.^[19] (See Gochang, Hwasun and Ganghwa Dolmen Sites.)

They are mainly distributed along the West Sea coastal area and on large rivers from the Liaoning region of China (the Liaodong Peninsula) to Jeollanam-do. In North Korea, they are concentrated around the Taedong and Jaeryeong Rivers. In South Korea, they are found in dense concentrations in river basins, such as the Han and Nakdong Rivers, and in the west coast area (Boryeong in South Chungcheong Province, Buan in North Jeolla Province, and Jeollanam-do.^[18] They are mainly found on sedimentary plains, where they are grouped in rows parallel to the direction of the river or stream.^[18] Those found in hilly areas are grouped in the direction of the hill.^[18]

Also called Muniyaras, these dolmens belong to the Iron Age. These dolmenoids were burial chambers made of four stones placed on edge and covered by a fifth stone called the cap stone. Some of these Dolmenoids contain several burial chambers, while others have a quadrangle scooped out in laterite and lined on the sides with granite slabs. These are also covered with cap stones. Dozens of Dolmens around the area of old Siva temple (Thenkasinathan Temple) at Kovilkadavu on the banks of the River Pambar and also around the area called Pius nagar, and rock paintings on the south-western slope of the plateau overlooking the river have attracted visitors.

Apart from the dolmens of Stone Age, several dolmens of Iron Age exist in this region especially on the left side of river Pambar as is evident from the usage of neatly dressed granite slabs for the dolmens. At least one of them has a perfectly circular hole of 28 cm diameter inside the underground chamber. This region has several types of dolmens. Large number of them are overground with about 70–90 cm height. Another type has a height 140–170 cm. There is an overground dolmen with double length up to 350 cm. Fragments of burial urns are also available in the region near the dolmens. This indicates that the dolmens with 70–90 cm height were used for burial of the remains of people of high social status. Burial urns were used for the burial of the remains of commoners. The dolmens with raised roofs might have been used for habitation of people. Why some people lived in the cemeteries has not been satisfactorily explained.

• Great dolmen – Type of dolmen in Nordic megalith architecture
• Inuksuk – Inuit built stone landmark or cairn
• Polygonal dolmen – Type of dolmen with five to nine supporting stones
• Rectangular dolmen – Rectangular, enlarged or extended dolmen
• Simple dolmen – Early form of dolmen or megalithic tomb

• 
  Trethevy Quoit – one of the best-preserved in Cornwall, UK dated to around 3500–2500 BCE
• 
  Chûn Quoit in Cornwall, UK, about 2400 BCE
• 
  Lanyon Quoit in Cornwall, UK, 3500–2500 BCE
• 
  A dolmen erected by Neolithic people in Marayur, Kerala, India.
• 
  Dolmens of Marayoor, India.
• 
  A southern-style dolmen at Ganghwa Island, South Korea
• 
  The biggest dolmen near Hwasun, South Korea
• 
  The dolmen Er-Roc'h-Feutet in Carnac, Brittany, France
• 
  Crucuno dolmen in Plouharnel, Brittany, France
• 
  Kilclooney More dolmen near Ardara, County Donegal, Ireland
• 
  Lancken-Granitz dolmen, Germany
• 
  T-shaped Hunebed D27 in Borger-Odoorn, Netherlands
• 
  Dólmen da Aboboreira, Baião, Portugal
• 
  Dolmen of Avola, Sicily
• 
  Dolmen of Bisceglie, Apulia
• 
  Dolmen of Fasano, Apulia
• 
  Tinkinswood, Vale of Glamorgan, Wales, around 3000 BCE
• 
  Dolmen of Oleiros, Galicia
• 
  Dolmen Sa Coveccada, Mores, Sardinia
• 
  Russia
• 
  Bulgaria
• 
  Keriaval Dolmen, Carnac, Brittany, France

• Murphy, Cornelius (1997). The Prehistoric Archaeology of the Beara Peninsula, Co. Cork. Department of Archaeology, University College Cork.^{[ISBN missing]}

• Cooney, Gabriel (2023). Death in Irish Prehistory. Dublin: Royal Irish Academy. ISBN 978-1-8020-5009-7.
• Holcombe, Charles (2011). A History of East Asia: From the Origins of Civilization to the Twenty-First Century. Cambridge University Press. ISBN 978-0521515955.
• Knight, Peter (1996). Ancient Stones of Dorset. Power Publications. ISBN 978-1898073123.
• Piccolo, Salvatore; Woodhouse, Jean (2013). Ancient Stones: The Prehistoric Dolmens of Sicily. Brazen Head Publishing. ISBN 978-0956510624.

• World heritage site of dolmen in Korea
• The Megalith Map
• The Megalithic Portal and Megalith Map
• "Dolmen (Goindol) sites in Korea". on UNESCO's World Heritage List.
• Jersey Heritage Trust
• Dolmens of Russia
• Dolmens. Part 2. How and for which purpose were they built? Hypotheses