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Louis II
Roman Emperor and King of Italy
Louis at the capture of Bari in 871 [1].
Reign	As King of Italy: 15 June 844 – 12 August 875; As Emperor: 850 – 15 June 875
Coronation	As King of Italy: 15 June 844, by Pope Sergius II, Rome; As Emperor: Easter 850, by Pope Leo IV, Rome; Again, 18 May 872, by Pope Adrian II, Rome
Born	825
Died	12 August 875
	Ghedi, Brescia
Buried	Basilica of Sant'Ambrogio, Milan
Predecessor	Lothair I
Nominated Successor	Carloman of Bavaria
Successor	Charles the Bald
Consort	Engelberga of Parma
Issue	Ermengard of Provence
Royal House	Carolingian Dynasty
Father	Lothar I
Mother	Ermengarde of Tours

Louis II the Younger (825 – 12 August 875) was the Holy Roman Emperor from 855 to his death.

He was the eldest son of the emperor Lothair I and Ermengarde of Tours. He became the designated king of Italy in 839, and taking up his residence in that country was crowned king at Rome by Pope Sergius II on June 15, 844.

He at once preferred a claim to the rights of an emperor in the city, which claim was decisively rejected; but in 850 he was crowned joint emperor at Rome by Pope Leo IV, and soon afterwards, in 851, married Engelberga and undertook the independent government of Italy. He marched into the south of Italy in the year of his imperial coronation and compelled the rival dukes of Benevento, Radelchis I and Siconulf, to make peace. His mediation split the Lombard duchy and gave Radelchis his share with Benevento as his capital and gave Salerno as a principality independent to Siconulf. Radelchis, now pacified, had no need of his Saracen mercenaries and happily betrayed them to the emperor. Louis fell on them and they were massacred. He then quashed some accusations against Pope Leo and held a Diet at Pavia. He confirmed the usurping regent Peter as prince of Salerno in December 853, displacing the dynasty he had installed there three years earlier. On the death of his father in September 855, he became sole emperor.

The division of Lothair's dominions, by which he obtained no territory outside Italy, aroused his discontent, and in 857 he allied himself with Louis the German against his own brother Lothair, King of Lotharingia, and King Charles the Bald. But after Louis had secured the election of Pope Nicholas I in 858, he became reconciled with his brother, and received some lands south of the Jura mountains in return for assistance given to Lothair in his efforts to obtain a divorce from his wife, Teutberga.

In 863, on the death of his brother Charles, Louis received the kingdom of Provence, and in 864 came into collision with Pope Nicholas I over his brother's divorce. The archbishops, who had been deposed by Nicholas for proclaiming this marriage invalid, obtained the support of the emperor, who reached Rome with an army in February 864; but, having been seized with fever, he made peace with the pope and left the city.

In his efforts to restore order in Italy, Louis met with considerable success both against Italy's turbulent princes and against the Saracens who were ravaging southern Italy. In 866 he routed these invaders, but could not follow up his successes owing to the lack of a fleet. So in 869 he made alliance with the eastern emperor, Basil I, who sent him ships to assist in the capture of Bari, capital of a local Islamic emirate, which succumbed in 871.

Louis' gravestone in Milan.

Meanwhile his brother Lothair had died in 869, and owing to his detention in southern Italy, Louis failed to prevent the partition of Lotharingia between Louis the German and Charles the Bald. Some jealousy between Louis and Basil followed the victory at Bari, and in reply to an insult from the eastern emperor Louis attempted to justify his right to the title "emperor of the Romans."

He had withdrawn into Benevento to prepare for a further campaign when he was treacherously attacked in his palace, robbed and imprisoned by Adelchis, prince of Benevento, in August 871. The landing of fresh bands of Saracens compelled Adelchis to release his prisoner a month later, and Louis was forced to swear he would take no revenge for this injury, nor ever enter Benevento with an army. Returning to Rome, he was released from his oath, and was crowned a second time as emperor by Pope Adrian II on May 18, 872.

Then Louis won further successes against the Saracens, who were driven from Capua, but the emperor's attempts to punish Adeichis were not very successful. Returning to northern Italy, he died, near Ghedi, in what is now the province of Brescia, on August 12, 875, and was buried in the church of Sant'Ambrosio at Milan, having named as his successor in Italy his cousin Carloman, son of Louis the German.

Wikimedia Commons has media related to:

Louis II, Holy Roman Emperor

• Annales Bertiniani and Chronica S. Benedicti Casinensis, both in the Monumenta Germaniae Historica. Scriptores, Bände i. and iii. (Hanover and Berlin, 1826 fol.)
• Muhlbacher, E. Die Regesten des Kaiserreichs unter den Karolingern (Innsbruck, 1881)
• Sickel, T. Acta regum et imperatorum Karolinorum, digesta et enarrata (Vienna, 1867—1868)
• Dummler, E. Geschichte des ostfrankischen Reiches (Leipzig, 1887—1888).
• Oman, Charles. The Dark Ages 476-918. London, 1914.

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