Ottoman earthquake revolving column - GIF
Revolving column used to check structural integrity of a building after an earthquake. Designed by Ottoman architect Mimar Sinan (1490-1588).
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Previously:
https://www.homemadetools.net/forum/...634#post170504
https://www.homemadetools.net/forum/...745#post155909
https://www.homemadetools.net/forum/...078#post207395
https://www.homemadetools.net/forum/...598#post234849
https://www.homemadetools.net/forum/...865#post213402
