Compaq you irritate me with your sense making,lol. Making me explain to you actually gives me a bit of that answer myself. The gate itself is a very large and formidable presence, one that when you see it it instantly grabs your attention. This is mostly due to the fact that it is out of place in its current surroundings, a lonely relic leftover from the old days of war and defense. It's size is impressive, as the woman in the picture can show. As I'm explaining it I realize that my composition doesn't reflect this as well as I would like since the gate fills the majority of the picture, however the everpresent cars and pedestrians were unrelenting in their moving through and around the gate.
Me personally I think the lighting worked as it was coming from my right and shining directly on the gate. I'm always interested to hear different opinions though
Here is another edit in which I removed the lightpole from in front of the gate. I zoomed in on the shadow that was mentioned on the wall and it appears to actually be something on the wall itself and its reflection in the water.