Ancient Planetarium

I worked this for Artstation' challange Ancient Civilizations: Lost & Found. I usually create scenes after references, so this time i really wanted to make something entirely on my own.

Here's link to the challenge topic:
https://www.artstation.com/contests/ancient-civilizations/challenges/19/submissions/15540?sorting=survivors

And here's a link to short description on the way i approached this challenge:
https://80.lv/articles/from-primitives-to-finished-environment/