The Holy Grail and Holy Thorn explores the legends of King Arthur and Joseph of Arimathea at Glastonbury and how their influence has been felt from medieval to modern times. Joseph was said to have built at Glastonbury the first church in Christendom, which made it a center of medieval pilgrimage, and gave Glastonbury an international profile in the fifteenth century. Through the winter-flowering holy thorn, said to have grown from Josephs staff, and later the Chalice Well, Glastonbury remained a focus of superstition in the Protestant centuries
