Bleetz
Highly recommended Low Poly Prop.
Clean, tidy and easy to use. Kinda makes me wish you had models of all the famous greek and roman places :)
This is my impression of a Greek amphitheatre (or amphitheater if you live in the USA), where plays and performances were shown. Often these were built into a natural hillside.
The model is a low poly game asset, with a number of PBR texture files that can be tuned in size to your liking. I tried to make it look naturally weathered, with murals on the large walls at the front and a tiled mosaic on the stage to add interest. The dirt plane ground can be removed if you're putting it into a game, and replaced with your preferred terrain - that's what I did in the game I'm working on. I added it more as an example than anything. Though, it might still come in handy for you.