03-18-2014, 08:54 AM
The main thing I would point out here are the symmetric elements really throwing it off. The banners wouldn't blow in opposite directions like that. The front entrance columns look a little flat also, they sort of melt into the ground taking away their dimension. Perspective it looks relatively sound though. Consider perhaps making the entrance a little more grand, right now it just looks like another hole in the wall like all the others going around the building, but with a frame. Shrinking the other windows and entrances would help create a stronger sense of scale, a Colosseum like that would hold tons of people, it should feel like it would when looking at it. Hopefully that helps a little, I be no means know much about architecture, but that's what stood out to me when looking at it. Good luck!