When designing Gothic cathedrals, some medieval builders drew on sacred measurements laid out in the pages of the Bible. In this podcast, we talked to art historian Stephen Murray from Columbia University to find out why. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. To learn more about Gothic architecture, visit pbs.org/nova/ancient