I have no idea which church the Gruetzmacher's attended in Galveston. But I ran across this postcard today and thought "that ain't no chapel". When I think of a chapel, I think of small. Really small. I think of Sister Mary Elephant (or whatever) telling Sidney Portier (in that thick German accent) that she wanted him to build a "shappell".
This ain't no shappell.
The Eaton Memorial Chapel was designed by architect Nicholas Clayton in the Gothic Revival Style. It was erected in 1878-82. After the city-wide fire of 1885, the chapel was used by St. Paul's German Presbyterian Church.