Brittany has long been famous for its Neolithic monuments, which include the largest prehistoric standing stone ever to have been erected in Western Europe, and the spectacular Carnac alignments. How and by whom were they built? This fully illustrated study aims to answer those questions using the results of recent French research on these sites, along with the insights provided by field studies. The emphasis is on the landscape setting of these monuments, and how that landscape may have influenced or inspired the construction of megalithic tombs and settings of standing stones.