1126

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political events

The new German king Lothair II makes Heinrich der Stolze (the Proud), 18, duke of Bavaria to succeed his late father, who has just died. A grandson of the late Bavarian duke Azzo d'Este IV (Guelph IV), Heinrich will marry Lothair's daughter Gertrude in May of next year (see 1137).

The Peace of 1126 ends hostilities between John II Comnenus and the Hungarians and Venetians. The Byzantine emperor secures Branicova on the Danube but is forced by Venice to renew the republic's exclusive commercial privileges.

Castile and León's queen Urraca dies after a 19-year reign and is succeeded by her son, who will reign until 1157 as Alfonso VII.

Melissande succeeds to the throne of Jerusalem upon the death of Baldwin; eldest daughter of the crusader king Baldwin II and his Armenian wife, Morphia, she marries Fulke V of Anjou, 24, with whom she will reign jointly beginning in 1131.

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Astronomy

Adelard of Bath translates Astronomical Tables by Al-Khwarizmi from the Arabic. About this time he also translates Al-Khwarizmi's Liber ysagogarum alchorismi ("introduction of algorism"), a work about arithmetic. See also 1111 Astronomy; 1142 Mathematics.

The first artesian well in Europe is drilled. In China, artesian wells are known before the common era.

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