Architectural Tileset

So I've been working out what pieces I need for the architecture. As I looked into what I wanted, I found more and more that I didn't really want heavily ruined architecture like I first imagined, and I leant more towards gothic architecture. In particular, flying buttresses and cathedrals. So I ended up with the following pieces:

I developed these as I was placing them in the level. These are currently just placeholder. They are the exact dimensions of the final models, but I expect to make the final models with a bit more geometry to make them look nice.

Here's what I put together so far (again, i have to stress, theres a lot of default UDK assets here still which arent mine):

Bridge/platform and Tower: