i have studied my romans over the years, and the center buildings are like the parthenon, and the towers in mid are like scaffolding. The throne room (flag room) is a nice out door gathering place, open sun with a roof for rain drainage.
On the other hand there are alot of pillars and note the unfinished building with pillars covering a hole to low tunnel, this is a map of my personal taste, and i love the way it turned out. i will use a different texture in the tunnel for sure, that one turned out nasty. Otherwise the buildings look accurate to what would be "modern" times back then.