One of the venues I visited during the 2016 Doors Open Milwaukee event was St. James Episcopal Church, located on Wisconsin Avenue between downtown and the Marquette University campus. The interior of the church is undistinguished. (or maybe I'm just getting jaded). Here is the one wide-angled shot of the interior, looking toward the rear, that I kept.
But the stained glass windows are much more impressive, including a pair commissioned to Tiffany.