Mercy I have to disagree with your reasons To me it seems you are nitpicking on the photo for no particular reason  Even if other religious beliefs Muslims Jews etc are represented the reality is that they are a very small minority when compared to Christians Why not just have a collage of a few congregation sites churches mosques etc and eliminate the gallery altogether To go over your points If Catholicism is the main religion then a Catholic Church should be prominently displayed Why not just change the caption What does it matter where the church is located San Juan is after all the main population center its like talking about Italy and choosing not to display the Colosseum because its in Rome