Francis II, Holy Roman Emperor
Francis II (; 12 February 1768 – 2 March 1835) was the last Holy Roman Emperor, ruling from 1792 until 6 August 1806, when he dissolved the Holy Roman Empire of the German Nation after the decisive defeat at the hands of the First French Empire led by Napoleon at the Battle of Austerlitz. In 1804, he had founded the Austrian Empire and became Francis I, the first Emperor of Austria, ruling from 1804 to 1835, so later he was named the one and only "Doppelkaiser" (double emperor) in history.
For the two years between 1804 and 1806, Francis used the title and style "by the Grace of God elected Roman Emperor, ever Augustus, hereditary Emperor of Austria" and he was called the "Emperor of both the Holy Roman Empire and Austria". He was also Apostolic King of Hungary and Bohemia as Francis I. He also served as the first president of the German Confederation following its establishment in 1815.
Henry IV, Holy Roman Emperor
The Romans soon fell away from their allegiance to the pope. Recalled to the city, Henry entered Rome in March 1084, after which Gregory was declared deposed and Antipope Clement III was elected by the Romans. On 31 March 1084 Henry was crowned emperor by Clement and received the patrician authority. His next step was to attack the fortresses still in the hands of Gregory. The pope was saved by the advance of Robert Guiscard, duke of Apulia, who left the siege of Durazzo and marched towards Rome: Henry left the city and Gregory was freed. Gregory soon died at Salerno, in 1085, but not before a last letter in which he exhorted the whole of Christianity to a crusade against the Emperor.