This Eastlund Concrete stamp is on a curb cut leading to the walkway to the side (Prospect Street) door of the former Unity Church on the corner of Prospect and Holmes, which I’ve written some about previously.
I pass the former church a lot and I’m sad to see that it’s still in a state of abandonment after its fire in 2019. Someone bought it and got the zoning changed to allow it to be converted into apartments. Granted, I can’t see inside, but I have the impression that renovation activity ceased at least a year ago.