The portal tomb

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 of these, though by no means all, contain human remains, but it is debatable whether use as burial sites was their primary function. Though generally known as dolmens the correct term accepted by archaeologists is portal tomb. However many local names exist, such as anta in 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.

Another type of megalithic monument is the single standing stone, or menhir. Some of these are thought to have an astronomical function as a marker or foresight, and, in some areas, long and complex alignments of such stones exist, for example, at Carnac in Brittany.

In parts of Britain and Ireland the best-known type of megalithic construction is the stone circle, of which there are hundreds of examples, including 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. They are assumed to be of later date than the tombs, straddling the Neolithic and the Bronze Ages.

[edit]Tombs

Large T shaped Hunebed D27 in Borger-Odoorn, Netherlands.

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.

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.

The Passage graves of Orkney, Ireland's Boyne Valley, and north Wales are even more complex and impressive, with cross-shaped arrangements of chambers and passages. The workmanship on the stone blocks at Maeshowe for example is unknown elsewhere in northwest Europe at the time.

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 megalithic 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.

Cup and ring marks, England

Further examples of megalithic tombs include the stalled cairn at Midhowe in Orkney and the passage grave at Bryn Celli Ddu on Anglesey. Despite its name, the Stone Tomb in Ukraine was not a tomb but rather a sanctuary.

[edit]Other structures

Associated with the megalithic constructions across Europe, there are often large earthworks of various designs – ditches and banks, broad terraces, circular enclosures known as henges, and frequently artificial mounds such as Silbury Hill in England and Monte d’Accoddi in Sardinia. Sometimes, as at Glastonbury Tor in England, it is suggested that a natural hill has been artificially sculpted to form a maze or spiral pattern in the turf.

It seems that spirals were an important motif for the megalith builders, and have been found carved into megalithic structures all over Europe – along with other symbols such as lozenges, eye-patterns, zigzags in various configurations, and cup and ring marks. While not a written script in the modern sense of the term, these symbols are considered to have conveyed meaning

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