Because of the sunlight, I don't get a feeling of being inside anything. The lighting gives away that you were standing outside when you took this and looking in and then back out through the other window. The only problem is that you can't really see much out the other side. I like the pattern and shape you've chosen to photograph here. I just wish there was something more interesting on the other side.
Interesting shapes and colors make this an appealing shot. The scene through the archway seems somewhat "busy" to me with the light, wall, and plant in the way of the marvelous glass front of the building, and I find it a bit distracting. I like the composition of the "archway through the archway" - it definitely draws you in to the photo.
Nice shot. However, cropping out the ugly grill may give the whole picture a whole new feel. And it would have been nice to have the light on the arc to have fallen a little further, but who can control the sun?
Even though I think, technically, this shot is not completely true to the challenge description, I find it such a compelling shot I just have to give it 7! Wonderful colours.