OK, four "identical" stops may make sense, but ten???
Most of you are probably aware that First Congregational Church in Los Angeles now claims to have the largest "church ogan" in the world. 40 years ago, when the Schlicker organ was put up in the rear balcony, I had season tickets for their concert series, usually about one per month. At that time the organ (which is actually at least two, because there was an original organ up in the front chancel) was a four-manual, and the church could easily be shaken at full volume.
Since then they have added considerably more, and it's now a five-manual with divisions sitting upon divisions.
The church itself is modeled after some English cathedral, and it is cathedral (cruciform) in layout. It is indeed an architectural gem (check it out on flickr, etc.) It sits at a "bend" in Sixth Street, the street actually bending around the building, and you can see it from quite a distance going west on Sixth St. To see it like that gives no idea of the organ(s) that are inside.
Incidentally, the church is not stone, it's reinforced concrete, and to the lower left side of the entrance, it says "erected 1931". It must have been a real boost to some contractor back in the Depression years. And it's not nearly as large as some of the European cathedrals, although it's not small, either.
Needless to say, they are somewhat picky about who they let play it. But there is certainly far more there than one can use at any one time.