The Mongol Empire was remarkable for its religious freedoms, and most of all, for its love of ideas and convergence of cultures. It brought lemons to China for the first time, and Chinese noodles to the West. It spread Persian carpets, German mining technology, French metalworking, and Islam. The cannon, which revolutionized warfare, was said to be the resulting fusion of Chinese gunpowder, Muslim flamethrowers, and European metalwork. It was Mongol openness to learning and new ideas that brought them together.