Nova: Building the Great Cathedrals

Explore the dazzling architecture of medieval cathedrals in this "Nova" program that celebrates the grandeur of these immense houses of worship. As many of these structures weaken to the point they might collapse, engineers team up with art historians and scientists to unravel the secrets of their construction in order to preserve their impressive beauty. 60 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo; Subtitles: English (SDH).