Beautiful drawings you got there. The water colors fit just perfect to be honest.
Can't find any Issues with the woman and the Roman architecture. They look great.
The room got a few perspective issues. Central perspective should look like this:
The ground squares are a few times parallel where they shouldn't be parallel. I guess you knew that already. The art itself is good.
And to the last one I can't really tell much. A cool fantasy forest I guess. Cartoonic trees. Nothing else.
Hope that's what you wanted to hear.