I was pleasantly suprised in my Spanish campaign whilst sieging Cordoba with four Trebuchets, I was able to attack their large Mosque and a few other of their style of buildings. Their large Mosque took two direct hits to the dome and the thing crumbled, pretty cool. I figured I would take the whole thing down, but in the end I think it is impossible to do so with any building, which is a shame.
Overall most every building was in flames, and some of the smaller wooden structures were almost completely destroyed giving off huge black smoke trails. I should have taken a screen shot, it was destruction to the extreme and their reinforcements must have seen the destruction from far out, wondering what in the world could have caused that.
Im using the DLV mod, and in vanilla I don't think you can attack religious structures, but this mod must allow you do so, which is huge.
You can attack religious buildings in vanilla all along.
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