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. Other structures 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). Spread of megalithic architecture in Europe 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