Hey there .. As someone that lived in Nashville (where there is a full size replica of the Parthenon) I have a few suggestions ... Also you might try going to http://www.munnsgallery.com/ cause he has awesome renders of a similar structure .. Built the 7 wonders of the world ... But anyway .. The columns are too short and there is a secondary interior set that goes about the main structure ... The roof is not made of stone like that but is a open woodwork lattice or was originaly to allow rainwater to colect in the center as a reflecting pool. The pillars are not perfectly in a row, they sort of bow a little to diminsh the effects of perspective and also slant slightly for the same reason ... Hope that helps some and I have more things but cant remember them right now .. If you have questions let me know and I will try to help.. Back to work