This is bihary's Caesarea Battle CCK map. I enjoyed it a lot, I hope you enjoy it too.
Furniture is the limiting factor. There is enough to support 62.5 houses. I have 62 houses consuming furniture and some Small Insulae thrown in for good measure. The battles were intense but once the enemies wiped themselves out I was able to grow SouthEast.
The only thing I exported was food. Delicious food.
This map probably isn't eternal, but it will last a damn long time without input.