'Guillaume de Chartres' (Guillielmus de Carnoto, Willemus de Carnoto), Prince of the Cistercian Principality of Seborga, was a grand master of the
Knights Templar 1210 –
26 August 1218.
In 1210, he assisted at the coronation of
Jean de Brienne as
King of Jerusalem. In
1211, he arbitrated between
Leo II of Armenia and the Templars, regarding the castle of
Bagras. During his rule, the order flourished in
Spain, achieving important victories against the
Moors.
Guillaume died of
pestilence, (possibly
endemic typhus), secondary to being wounded during the siege of
Damietta, in Seborga in the Holy Land.
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Templiers information