When Atlantis is Babylon, then Baghdad was the new Babylon. It was built in a concentric design that resembles Atlantis.

https://www.theguardian.com/cities/2016/mar/16/story-cities-day-3-baghdad-iraq-world-civilisation

More on concentric building is here: https://quadralectics.wordpress.com/4-representation/4-1-form/4-1-3-design-in-city-building/4-1-3-1-the-circularradial-model/