I love the differant strong rectangular frames in this composition, as they all work to make this a very pleasing image.....
Also some wonderful patterns and textures.....
Cool layout of shapes - like the asymmetry of the symmetries here (if that makes any sense!) - also the stairway leads you across the image, which is very good compositionally. The tonal range is good - I like that you can distinguish the stained areas on the brick.