Something I'd like to see added is some sort of idea for unique buildings, akin to the unique unit idea. For example, perhaps "Coloseum" would be a unique Roman Building, while "Ziggurat" would be unique to Babylon, for instance. The editor could have a spot to select civilizations able to build civilization unique buildings, just as it has for UU's.

Neat idea.

I don't think Civs should have unique building because they dont really need them, between the leader traits, reilgons (unqiue reilgous buildings) and civics options we dont really need anymore diversity in the Civs, we have enough. But a bit off topic but if the Coloseum is in this game it should be at least a small wonder rather then allowing everyone to build it, there only one of them not one in every city, the closest thing to the Coloseum in nearly every Roman City was the Amphtheatre(sp?)

Flavour building like Flavour units would be cool, although they're do-able already in CIV3.

I like the idea, although Colonel does make a good point...

I'm thinking more about the modding community when I make this suggestion. It's a real hassle to make civilization specific buildings otherwise... creating civ specific techs to create civ specific buildings is cumbersome, in a way... it's way more subtle to use a universal tech available to all civilizations, and allow civ specific buildings... ie. polytheism allows ziggurat and druidic temple, for example, rather than creating a tech called Babylonian Religion and one call Druidic Worship, making them non-era, and then making them civ specific. They should at least allow this option in the editor, to make things easier for modders. You could create UU's by using civ specific techs, too, but I'm really glad the editor is set up so this method is unnecessary...

Unique graphics is OK too me, but not absolutly unique buildings.

I would be happy with government or religion specific building but I think the civ specific is overkill. As has been stated, the traits that are in the civ are the same that would be in the buildings.