CK of Arbitrary Marks correctly guessed that the church in question is First Unitarian Church of Chicago. It’s right across the street from Meadville-Lombard Theological School, next to the University of Chicago campus. This church has a long history, with such interesting highlights as one of the few crypts in a UU church and its hosting of the Midwest Buddhist Temple back in the 1940s, the first time a historically Christian church had ever allowed Buddhists to hold services in their building.
Here are some more pictures for you to enjoy. First, an outside shot of the doors to the new(er) sanctuary. Second, a shot of that sanctuary, taken from the altar. Third and fourth, two plaques hanging on either side of the altar: birth and death. Finally, a shot of the old chapel, the original sanctuary of the church.