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Manuel I(Manuel Comnenus) (kŏmnē`nəs), c.1120–1180, Byzantine emperor (1143–80), son and successor of John II. He began his reign with a war against the Seljuk Turks, the subjugation of Raymond of Antioch, and an alliance with the German king, Conrad IIIConrad III,
c.1093–1152, German king (1138–52), son of Frederick, duke of Swabia, and Agnes, daughter of Holy Roman Emperor Henry IV; first of the Hohenstaufen dynasty.
..... Click the link for more information. , against Roger of Sicily. In 1147 the Second Crusade (see CrusadesCrusades
, series of wars undertaken by European Christians between the 11th and 14th cent. to recover the Holy Land from the Muslims. First Crusade
In the 7th cent., Jerusalem was taken by the caliph Umar.
..... Click the link for more information. ) was preached and although Manuel aided the Crusaders, he made a truce with the Turks in order to protect his western provinces, which had been invaded by Roger. At first Manuel relied on mercenaries and the help of Venice, but in 1155 he invaded S Italy. Defeated at Brindisi in 1156 by William I of Sicily, in 1158 he made peace with him (which lasted for 30 years) and withdrew his forces. Manuel subsequently directed his diplomacy against Holy Roman Emperor Frederick IFrederick I
or Frederick Barbarossa
[Ital.,=red beard], c.1125–90, Holy Roman emperor (1155–90) and German king (1152–90), son of Frederick of Hohenstaufen, duke of Swabia, nephew and successor of Holy Roman Emperor Conrad III.
..... Click the link for more information. , supporting Pope Alexander IIIAlexander III,
d. 1181, pope (1159–81), a Sienese named Rolandus [Bandinelli?], successor of Adrian IV. He was a canonist who had studied law under Gratian and had taught at Bologna.
..... Click the link for more information. , and uniting both the Western Empire and Church with his Eastern Empire and Church. With all of his energies directed to the West, Manuel neglected Asia Minor, which led to his crushing defeat (1176) by the Turks at Myriocephalon. Manuel liked Westerners and gave them high positions in the empire. During his reign Genoese, Pisan, and Venetian merchant colonies grew at Constantinople and began to be influential. His son Alexius II succeeded him.