Nearly thirty years ago, a television documentary programme about a tiny French village ended with the words: 'Something extraordinary is waiting to be found on this mountaintop and in the not too distant future, it will be'. Today Rennes-le-Chateau, the village in the French Pyrenees, is world-renowned. Bornholm is a tiny island in the Baltic Sea, a thousand miles to the north. This book will show how these two specks upon the surface of the earth are tied indissolubly together. They have been touched by the hands of master builders who shared a common expertise and a common body of knowledge. Bornholm is barely 20 miles by 10 and possesses 15 extraordinary medieval churches and many hundreds of standing stones which mark the island out as a sacred site in remote antiquity. These ancient markers - and especially the churches - demonstrate a skill in land surveying, geometry and mathematics which is as brilliant as it is unexpected. It is a knowledge which was je alously guarded and handed on. In the Middle Ages, those mysterious mediaeval warrior monks, the Knights Templar, were still using and developing the same expertise. And they were doing it knowingly. This treasure of the '