Witzelstr. 55 is the address of a mixed commercial and industrial trade area in the middle of Duesseldorf that was entirely abandoned in mid-2002.
Since then, lots of interesting things have been going on there. I'm working on a more ambitious project, but until then, here is a slideshow of images taken in October 2007, April 2008, and August of 2009. However, I recommend that instead of watching this glorious decay through a little window, you follow the link below to my Picasa photo album, and run a full-screen slideshow.