Are you familiar with Forgotten Chicago? Their website helps serve their mission “to discover and document little known elements of Chicago’s infrastructure, architecture, neighborhoods and general cityscape, whether existing or historical. ” They provide a lot of historical information and documentation on the site, as well as offer periodic historical walking tours, keep an active Twitter feed going with updates on historical Chicago buildings and/or neighborhoods. Their site also hosts some fairly active forums with questions and discussions about everything from hot dog stands and old funeral homes, to ice-delivery doors in the backs of residential buildings.
The picture above is from a short post on their website about the stained glass windows in our neighborhood. Do you have an entrance like this on your building? Consider sending a picture to Forgotten Chicago to add to their survey and send one our way too!