Building the Great Cathedrals
How did medieval engineers construct magnificent skyscrapers of glass and stone?
Expired: 01/21/16Video has closed captioning.
Problems Playing Video?
Funding for NOVA is provided by David H. Koch, the Corporation for Public Broadcasting and PBS viewers. Original funding provided by Exxon Mobil, Pacific Life, the David H. Koch Fund for Science, HHMI, the Corporation for Public Broadcasting, and PBS Stations.