I suspect this cool church was also an Eastern Orthodox church at one point, and is right next door to the Greek Orthodox church. It is still occupied, and looks great. It’s a fascinating mix of Modernism and Romanesque or Byzantine style.
A Blog detailing the beauty of St. Louis architecture and the buildup of residue-or character-that accumulates over the course of time.
This is the former State Street Baptist Church: the original name is in concrete under the signage. It’s not far from the former Greek Orthodox Catholic Church which moved up the bluffs in the late 1970s.