Is it simulating cells? atoms? or treating the neurons as black boxes?
From a quick read of the model used [0], it seems to simulate neurons and muscles at a functional level (not atoms or cell internals).
[0] - https://github.com/openworm/c302 (linked in the original github page)
Edit: Oh, maybe you meant "Ancient Rome"?
"Ancient history covers all continents inhabited by humans in the period 3000 BC – AD 500."