>> F.L. Wright's architectural style does not lend itself to churches or cathedrals easily. <<
Wright's crowning achievement is the Copley Place church in Boston.
dangus, I have a large book of FLW's drawings and I do not see a Copley Place church listed in it. Nor do I see it on the FLW plan lists on the web (admittedly a cursory look). The only church in Copley Place is the (quite lovely) Episcopal Church designed by H.H. Richardson.
Our parish church is designed in the "Richardsonian" (Romanesque Revival) style.
Some FLW churches:
I don't think much of the "flying saucer" Greek Orthodox church, but the others aren't too bad.
Not traditional, though.
FWIW, I hate the proposed Ave Maria chapel. It would be possible to do something more traditional in brick or stone that would fit in with the "Prairie style" FLW architecture.