Day 337 - Those little triangular shadows

I find it hard to focus on this photograph. I think it's because of the many different lines, angles and planes in the shot and especially because of those little triangular shadows to the bottom right of each of the windows.

I don't know what prompted me to take this picture but I'm glad I did. I then took four more at different levels of zoom but it's this first one, with the slight tilt to the windows, that I like best. The early morning sunlight makes the concrete of the building glow and creates those little shadows, making the whole thing a little bit like abstract art.