VATICAN CITY—Hurrying outside after hearing a disturbingly loud thud against the side of the church, Pope Francis was reportedly left to clean up the remains of a dead angel Monday that flew straight into one of the Sistine Chapel’s windows. “It’s really sad; it seems like one of these guys crashes into a window at least once a week,” said the pontiff, who appeared visibly distressed while sweeping up the feathers scattered around the angel’s lifeless body.