Complex sentence: In May of 1857 the Emperor and Empress of Austria invited the towering native of Ireland to visit their kingdom, while he was on tour throughout Europe he died of smallpox in Marseilles at the age of twenty-eight.
Split into simpler sentences: In May of 1857 the Emperor and Empress of Austria invited the towering native of Ireland to visit their kingdom, while he was on tour throughout Europe. He died of smallpox at Marseilles at the age of twenty-eight.