Megalithic art is found in many places in Western Europe although the main concentrations are in England, Malta, Ireland, Brittany and Iberia.
Approximately 70% of Ireland's ancient decorated rocks and stones are to be found in the Boyne Valley (o'Sullivan 1997;19) The French region of Brittany has the second highest concentration of megalithic art.
The gallery grave at Züschen in Germany is an intriguing exception, as it appears to mix motifs known from the west European megalithic tradition with others more familiar from alpine Rock art.
As well as abstract or geometric art, some carvings are considered to represent tools, weapons, animals, human figures, deities or idols.
For instance, some of the tombs in the valley of the Petit Morin in France and elsewhere contain engravings of breasts, noses, hair, and a collar or necklace.