The story of the Holy Grail has gripped the imaginations of millions since it first appeared in medieval romances, among them Wolfram von Eschenbach's Middle High German Parzival (c. 1210). Strangely, the Grail is identified in Parzival not as a cup or dish, but as a stone. This oddity is usually interpreted merely as further evidence of the difficulty of discerning the true sources of the Grail legend. G. Ronald Murphy seeks to illuminate this mystery and to enable a far better appreciation of Wolfram's insight into the nature of the Grail and its relationship to the Crusades. Wolfram's "sacred stone" was in fact a consecrated altar, precious by virtue of the sacrament but also, Murphy argues, by virtue of the material from which it was made: a precious green stone associated with the rivers of Paradise. Parzival, Murphy believes, was intended as an argument against continued efforts by Latin Christians to recover the Sepulchre by force. In Wolfram's story, warring Christians and Muslims are brought together in peace by the power of the Grail - a stone Murphy believes still exists. An entirely original reading of Wolfram's famous text, this engrossing and accessible book appeals not only to scholars and students of medieval literature but to anyone who is drawn to the lasting mystery of the Holy Grail.

How electric light created new spaces that transformed the built environment and the perception of modern architecture. In this book, Sandy Isenstadt examines electric light as a form of architecture—as a new, uniquely modern kind of building material. Electric light was more than just a novel way of brightening a room or illuminating a streetscape; it brought with it new ways of perceiving and experiencing space itself. If modernity can be characterized by rapid, incessant change, and modernism as the creative response to such change, Isenstadt argues, then electricity—instantaneous, malleable, ubiquitous, evanescent—is modernity's medium. Isenstadt shows how the introduction of electric lighting at the end of the nineteenth century created new architectural spaces that altered and sometimes eclipsed previously existing spaces. He constructs an architectural history of these new spaces through five examples, ranging from the tangible miracle of the light switch to the immaterial and borderless gloom of the wartime blackout. He describes what it means when an ordinary person can play God by flipping a switch; when the roving cone of automobile headlights places driver and passenger at the vertex of a luminous cavity; when lighting in factories is seen to enhance productivity; when Times Square became an emblem of illuminated commercial speech; and when the absence of electric light in a blackout produced a new type of space. In this book, the first sustained examination of the spatial effects of electric lighting, Isenstadt reconceives modernism in architecture to account for the new perceptual conditions and visual habits that followed widespread electrification.