7ft Burnham Blueprint Chicago Congress St 1936

Hi there everybody, I'm reaching out as a result of I've had a variety of issue getting any type of solutions about this piece. I’ve tried reaching out to the Architectural Establishment of Chicago in addition to a number of museums, and have by no means acquired a solution again. I'm making an attempt one thing just a little unorthodox, and seeing if Reddit might provide any extra details about what that is and even probably it's value. What I do know, is that this can be a 1936 blueprint of Congress st. in addition to a big a part of downtown Chicago. It was drafted by the Architectural agency of Burnham & Hammond. I believe the Burnham concerned could have been John Burnham, son of Daniel Burnham. The blueprint itself measures about 7 ft 6 in, And plenty of of those buildings depicted within the blueprint are nonetheless standing at present.The body is professionally customized matted and framed. Once more, I drastically recognize any data or theories as to what this was used for and probably its value. On the very least, I hope that is an attention-grabbing put up. Thanks, everybody!