What material is the dome of Rome Pantheon made from?

concrete
marble
sandstone
wood
The temple - 43 meter in diameter - was built by emperor Hadrian. Its dome with 8-meter wide oculus was built of un­re­in­forced concrete that has been a mystery for ages. The weight of Roman concrete used to build the mono­litic struc­ture is merely 1/5 of common con­crete. Such effect was achieved by mixing in of volcanic tuff and pumice.

Answers distribution

concrete
marble
sandstone
wood
answers
flagPoland
35%
17%
43%
3%
260
flagUnknown
20%
20%
60%
0%
10

Gender

men33%
women30%
concrete
33%
30%
marble
14%
10%
sandstone
46%
52%
wood
4%
6%

Language versions

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What material is the dome of Rome Pantheon made from?
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Details

Author: smyru
Illustration: Gonzalo Malpartida
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