I think you are too strict avoiding project with religious buildings
I believe it's right to keep a prohibition against strong religious or political references, but at the same time I think that to include a church in an "architecture" project is a bit exaggerated especially if there aren't explicits references or symbols. Do you know that the "leaning tower" in Pisa is the bel tower of the cathedral? And that San Marco in Venezia is another cathedral? But you have inserted them in your models! So why can't I publish a model of Florence with the cathedral?
LEGO Ideas maintains stricter guidelines than the rest of the LEGO Group when it comes to what we consider appropriate or inappropriate themes.
Religion is one of those themes where we opt to disallow submissions.
But, I'm afraid that some users might be put off (perhaps even myself) if LEGO Ideas allowed itself to be polarized like this.
That being said, maybe something that is super recognizable as something other than a religious building (like your examples or an old, pre-Gothic cathedral) would be great.
I was going to vote for this suggestion, but I must say that after reading Dadski@7's reply, I agree with his viewpoint.
As much as I agree with this suggestion and would like to submit a cathedral or other church, I fear it would inspire a "religious vote", acting more as a show-of-hands or a head-count of the Lego Ideas members belonging to that religion. Really, who wouldn't want just to see their religion in a Lego set? I know, personally, that if there was a church, from my faith, on Lego Ideas, I would vote no matter how awful the project looks, as long as it wasn't offensive.
I completely agree with this! Please at least think about it.
Many Cathedrals have become museums at this point, even, no longer places of worship, and anyway they are more of icons than churches.