The Easter Surprise
It was another Holy Week in the Vatican. The current Pope, Rodrigo Borgia, had just finished his favorite manner of business. Known to the Christian world as Pope Alexander VI, the Spaniard preferred all manner of depraved activities. Having spent this Easter having incestuous relations with his daughter, Lucrezia, he began to muse on what to do next. Most of his political enemies had been disposed of. He had a never-ending chain of courtesans and prostitutes coming to him.
The Pope's mind shifted towards recent news from the East. The Turks and Eastern Orthodox sects had been suffering at the hands of some mysterious army from somewhere far away. Borgia had hoped that an enemy of those heretics and fools would be a valuable ally for him. Hopefully, he could murder Lucrezia's current spouse and marry her off to whoever was in charge. Then, he would kill them off once they had outlived their usefulness.
It was then that the ground began shaking. Borgia tried to brace himself, but it was pointless. The freshly painted walls of the Basilica began to crumble down. A crucifix fell and crushed the corrupt Pope and his daughter in a cosmic sense of irony. The crucifix itself was crushed into twisted metal by the bombardment. Far above Vatican City was an aerial armada of steam-driven airships. The Mongol Empire had industrialized using Chinese and Arab sciences (as well as Greek texts taken from Arab sources), and was now literally flattening all who stood in its way from the air. The Vatican was blasted into history, with Christendom soon to follow.