books.google.com - In the fourth century the idea arose that the Cross on which Christ was crucified had been found by Helena, mother of Emperor Constantine. Thus began a legend that would grow and flourish throughout the Middle Ages and cause the diffusion of countless splinters of holy wood. And where there is wood,...http://books.google.com/books/about/A_Heritage_Of_Holy_Wood.html?id=vVcRd2sldBIC&utm_source=gb-gplus-shareA Heritage Of Holy Wood