I placed these pillars on all four corners of of the piazza and I used the same follow me technique as I did for the water fountain and tried to make a some sort of old tower with a sharp head up top. It did not go as planned, but you only work with what you get and in the end, I got it to work
I had a few issues at first with my fountain as it wasn't how I imagined it to be, but I got it to work after issues with the follow me tool. I had created it out of marble and made a pool underneath the base of the fountain.
The front wall I had made was with creating certain intriqute shapes cut in to the wall, then extending the wall to certain lengths and while trying to make it look creative. I also added a little window you could look through so you could see through on the front side. I also attached mirrors on the sides of the arch where you could see yourself as you look at my masterpiece.
Here is a link to a video I have made showing the whole piazza in a first person perspective so you can look at the masterpiece that I had created
Here is a Video of me showing how I created my Piazza using SketchUp