Italy 2012 / 20120601e_M_FlorenceClimbingDuomoSteps
Ruth Milner, rmilner plus web at bookofmarvels dot net
3/18/2013
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20120601e_M_FlorenceClimbingDuomoSteps Climbing the Dome

Designing the dome so that it could be self-supporting was incredibly difficult from an engineering perspective. Brunelleschi solved this in part by making it two domes, one inside the other, built of brick. The stairway spirals around between them.
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