Constantin Brancusi, leading modernist sculptor. Apparently he was quite involved with the Church from an early age.
We had this version of his sleeping muse at the Chicago Art Institute:
Though I havent seen it on display in over a year. I think the Institute still claims to have it. Maybe it's being lended to another museum or is in preservation / restoration. I always made it a point to see it when it was on display, and I miss it. I think we have a couple prints of his as well. Detroit has the similarly named and designed, but much more strange looking "Sleeping Child", something that is never on my agenda to look at while I'm there.
Do you have a source on his Church involvement? In my mind I have it stored that he was raised Orthodox, but was more concerned with folk traditions and a vague spirituality (maybe something similar toTolstyism) . I tried to quickly look up is spiritual tendencies when I read your post, but found nothing, so I don't know where I got that info. If it was in an art book, it's probably either destroyed or back in Ohio, so I can't fact check on my books.