Building the Great Cathedrals

Season 37 Episode 11 | 53m 7s | Video has closed captioning.

How did medieval engineers construct magnificent skyscrapers of glass and stone?

Aired: 10/18/10

Expired: 05/29/19

Rating: TV-G

Problems Playing Video? | Closed Captioning

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Parenting is full of obstacles that can be hard to navigate—even without a toddler yelling at your face. There’s no instruction manual, which means discerning fact from fiction and reasonable from ridiculous can be maddening. That’s where Parentalogic comes in, a digital series from NOVA and PBS Digital Studios.