LOUIS (804–876)  surnamed the " German," king of the East Franks, was the third son of the emperor Louis I. and his wife Irmengarde . His early years were partly spent at the court of his grandfather Charlemagne, whose special affection he is said to have won . When the emperor Louis divided his dominions between his sons in 817, Louis received Bavaria and the neighbouring lands, but did not undertake the government until 825, when he became involved in war with the Slavonic tribes on his eastern frontier . In 827 he married Emma, daughter of Well I., count of Bavaria, and sister of his stepmother Judith; and he soon began to interfere in the quarrels arising from Judith's efforts to secure a kingdom for her own son Charles, and the consequent struggles of Louis and his brothers with the emperor Louis I . (q.v.) . When the elder Louis died in 84o and his eldest son Lothair claimed the whole Empire, Louis in alliance with his half-brother, king Charles the Bald, defeated Lothair at Fontenoy on the 25th of June 841 . In June 842 the three brothers met on an island in the Saone to negotiate a peace, and each appointed forty representatives to arrange the boundaries of their respective kingdoms . This developed into the treaty of Verdun concluded in August 843, by which Louis received the bulk of the lands of the Carolingian empire lying east of the Rhine, together with a district around Spires, Worms and Mainz, on the left bank of the river . His territories included Bavaria, where he made Regensburg the centre of his government, Thuringia, Franconia and Saxony . He may truly be called the founder of the German kingdom, though his attempts to maintain the unity of the Empire proved futile . Having in 842 crushed a rising in Saxony, he compelled the Abotrites to own his authority, and undertook campaigns against the Bohemians, the Moravians and other tribes, but was not very successful in freeing his shores from the ravages of Danish pirates . At his instance synods and assemblies were held where laws weredecreed for the better government of church and state .

In 853 and the following years Louis made more than one

attempt to secure the throne of Aquitaine, which the people of that country offered him in their disgust with the cruel misrule of Charles the Bald . But though he met with sufficient success to encourage him to issue a charter in 858, dated " the first year of the reign in West Francia," treachery and desertion in his army, and the loyalty to Charles of the Aquitanian bishops brought about the failure of the enterprise, which Louis renounced by a treaty signed at Coblenz on the 7th of June 86o . In 855 the emperor Lothair died, and was succeeded in Italy by his eldest son Louis II., and in the northern part of his kingdom' by his second son, Lothair . The comparative weakness of these kingdoms, together with the disorder caused by the matrimonial troubles of Lothair, afforded a suitable opening for the intrigues of Louis and Charles the Bald, whose interest was increased by the fact that both their nephews were without male issue . Louis supported Lothair in his efforts to divorce his wife Teutberga, for which he received a promise of Alsace, while Charles opposed the divorce . But in 865 Louis and Charles meeting near Toul, renewed the peace of Coblenz, and doubtless discussed the possibility of dividing Lothair's kingdom . In 868 at Metz they agreed definitely to a partition; but when Lothair died in 869, Louis was lying seriously ill, and his armies were engaged with the Moravians . Charles the Bald accordingly seized the whole kingdom; but Louis, having recovered, compelled him by a threat of war to agree to the treaty of Mersen, which divided it between the claimants . The later years of Louis were troubled by risings on the part of his sons, the eldest of whom, Carloman, revolted in 861 and again two years later; an example that was followed by the second son Louis, who in a further rising was joined by his brother Charles . A report that the emperor Louis II. was dead led to peace between father and sons . The emperor, however, was not dead, but a prisoner; and as he was not only the nephew, but also the son-in-law of Louis, that monarch hoped to secure both the imperial dignity and the Italian kingdom for his son Carloman . Meeting his daughter Engelberga, the wife of Louis II., at Trent in 872, Louis made an alliance with her against Charles the Bald, and in 874 visited Italy doubtless on the same errand .

The emperor, having named Carloman as his successor, died in August 875, but Charles the Bald reached Italy before his

rival, and by persuading Carloman, when he did cross the Alps, to return, secured the imperial crown . Louis was preparing for war when he died on the 28th of September 876 at Frankfort, and was buried at Lorsch, leaving three sons and three daughters . Louis was in war and peace alike, the most competent of the descendants of Charlemagne . He obtained for his kingdom a certain degree of security in face of the attacks of Normans, Hungarians, Moravians and others . He lived in close alliance with the Church, to which he was very generous, and entered eagerly into schemes for the con-version of his heathen neighbours . See Annales Fuldenses ; Annales Bertiniani ; Nithard, Historiarum Libri, all in the Monumenta Germaniae historica . Scriptores, Bande i. and ii . (Hanover and Berlin, 1826 seq.) ; E . Dummler, Geschichte des ostfrankischen Reiches (Leipzig, 1887—1888) ; Th . Sickel, Die Urkunden Ludwigs des Deutschen (Vienna, 1861—1862); E . Miihlbacher, Die Regesten des Kaiserreichs unter den Karolingern (Innsbruck, 1881) ; and A . Krohn, Ludwig der Deutsche (Saarbriicken, 1872) .

(A . W .