Name Prefix:<NPFX> Emperor
(Research):d. 875, emperor of the West (855-75), king of It
aly (844-75), son of Emperor of the West Lothair I. In 844
, Lothair I designated him king of Italy and in 850 he wa
s crowned emperor of the West in Rome. He became sole emper
or when his father died; the title had little meaning, howe
ver, since he ruled only in Italy. Throughout his reign, hi
s power there was challenged by the independent Lombard duk
es and by the Arab invaders of S Italy. In the dispute betw
een his brother Lothair , king of Lotharingia, and Pope Nic
holas I, concerning Lothair's divorce, he supported his bro
ther. However, the pope refused to allow Lothair to set asi
de his wife even after Louis occupied Rome (864). Subsequen
tly, Louis submitted to the pope's decision. At Lothair's d
eath (870) Louis claimed Lotharingia, but the Treaty of Mer
sen divided it between his two uncles, Charles the Bald (wh
o succeeded Louis as Emperor of the West Charles II ) and L
ouis the German .
Columbia Encyclopedia, Sixth Edition, Copyright (c) 2004.