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The Treaty of Meerssen or Mersen, concluded on 8 August 870, was a treaty of partition of the realm of Lothair II by his uncles Louis the German of East Francia and Charles the Bald of West Francia, the two surviving sons of Emperor Louis I the Pious. The empire of Louis the Pious, son of Charlemagne, had originally split in three parts by the 843 Treaty of Verdun, whereas his eldest son Lothair I received the Imperial crown and the personal realm of Middle Francia, while: Louis († 876), the second born son, received East Francia (which would evolve into the Kingdom of Germany) Charles the Bald († 877), his half-brother, received West Francia (which would evolve into the Kingdom of France) Upon the death of Lothair I in 855, his realm of Middle Francia was partitioned between his sons by the Treaty of Prüm: Louis II († 875), the eldest son, received the imperial crown and Italy Charles († 863) became King of Provence (Lower Burgundy and Provence proper) Lothair II († 869) received Austrasia (the central part still controlled by his father after Verdun), Frisia and Upper Burgundy - this realm came to be named ''Lotharii Regnum'' (Lotharingia) Lothair II ceded the southeastern parts of Upper Burgundy to his brothers, whereas Charles of Provence received the bishoprics of Belley and Tarentaise in 859, and Louis II of Italy the bishoprics of Geneva, Lausanne and Sion a year later. Charles of Provence suffered from epilepsy and died heirless in 863, and his kingdom was partitioned between his brothers. Lothair II, his heir, received only the western Lower Burgundian parts (bishoprics of Lyon, Vienne, Vivarais and Uzès) which were bordering his western Upper Burgundy (remnants of his original Burgundian possessions), while Louis II received the whole rest of the Kingdom of Provence. Lothair II died in 869 without legitimate children so his heir was his brother, Emperor Louis II of Italy. As Louis was at that time campaigning against the Emirate of Bari, his uncles, Louis the German and Charles the Bald, took his inheritance. Charles had himself crowned in Metz the same year, but was forced by his brother to partition the short-lived Lotharingia, together with the lands Lothair II acquired after the death of Charles of Provence, as they had agreed at Metz in 868. Their contract of 870 at Meerssen replaced the 843 Treaty of Verdun, after which the Carolingian Empire was also split into three parts, by dividing the northern half of Middle Francia stretching from the Rhone valley to the North Sea, in effect recombining sundered territories of Francia into two larger east and west divisions. However, at this time large parts of the Frisian coast were under Viking control and therefore only divided on paper. The borderline ran roughly along the rivers Meuse, Ourthe, Moselle, Saone and Rhone. In the north, Louis received most of Lothair's Austrasia, with his eastern part including both Aachen and Metz, and most of Frisia. But in the south, while Louis received most of Upper Burgundy that was left to Lothair (after ceding the southern half to Italy), Charles received Lothair's inheritance in Lower Burgundy (including Lyon) and a small western part of Upper Burgundy (parts of Portois and Varais (including Besancon)) - this opened him the way to Italy. Louis joined the newly acquired parts of central Austrasia to the subkingdom of his son Louis the Younger in eastern Austrasia, while the illegitimate son of Lothair II, Hugh, was granted the Duchy of Alsace. The arrangement did not endure more than ten years. Upon the death of Louis the German in 876, Charles the Bald, by then King of Italy and Emperor, attacked eastern Lotharingia, but was rejected by Louis the Younger in the Battle of Andernach (876). In turn, after Charles the Bald had died and his successors struggled to consolidate their rule over West Francia, Louis the Younger campaigned in western Lotharingia in 879. Charles' grandsons were forced to cede the whole Lotharingia to him, sealed by the 880 Treaty of Ribemont, according to which it finally became part of East Francia. ==See also== *Carolingian dynasty *Treaty of Verdun (843) *Treaty of Prüm (855) *Treaty of Ribemont (880) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Treaty of Meerssen」の詳細全文を読む スポンサード リンク
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