Tiwanaku, the oldest city in the world, and the first culture to use cubism ?

Many questions surround Tiwanaku. Was it the oldest city on earth? How did it disappear? Where did its people go? One thing is certain though, as the longest-lived civilisation of the American continents, it has left us ruins to fire the imagination.

Here is the link to Dr Garrett Ryan's channel :
https://www.youtube.com/channel/UCqBiWcuTF8IaLH7wBqnihsQ

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