I've always marvelled how some structures, built centuries ago could withstand the harshest weather and still not crumble.
One such example is the Forbidden City. Not a single nail or drop of glue was used to hold the buildings together. Yet, it managed to withstand multiple earthquakes and fire over a 500 year history.
This documentary briefly talks about its history and sheds some light on the secret construction technique used to construct this magnificent historical site.
Enjoy!
https://www.youtube.com/watch?v=nbbHrWRBXF0
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