Thans, Lydia, for commenting! ("The noise in the sky" is probably prominent due to the --important--crop in order to make the image an "abstract.) -- db.
I "met" this building "in person" before seeing too many pictures of it: and from the first time on its architecture has fascinated me again and again (If you wish, see more: <http://www.pbase.com/bollag/bilbao ). Thanks a lot, Joshua, for your friendly words on the image! -- db.