Pedro de Montaigu (also known as Pierre de Montaigu, Peter de Montaigu, or Petrus de Monteacuto) was the 15th Grand Master of the medieval Knights Templar and presided over this knighthood for 14-years during the 5th and 6th Crusades. It was during his tenure that the relationship between the Knights Hospitallers and the Templars eased. He is remembered for his diplomatic prowess and for serving as an arbiter during various conflicts.
Montaigu was born sometime toward the end of the 12th century. It is unknown when he joined the Templars, but it is known that Montaigu served as Master of Provence and Aragon from 1211 until 1218.
He took part in the Siege of Damiette alongside Guillaume de Chartres, the Grand Master of the Order at the time. After the death of de Chartres in 1218, Montaigu was elected as Grand Master of the Templars. During his time as Grand Master, the Hospitallers were led by a Guerin de Montaigu who is thought to have been his brother.
The Sultans of Cairo and Damas united to defeat the Christians, but were repelled by an army composed of the Templars, Hospitallers, and the Teutonic Knights. The Sultan of Damas then tried to barter a truce with the Christians via the Templar Grand Master, but the Papal Legate, Pelage, refused to accept it so the truce fell through. Had this truce come to fruition, the Sultan had promised to return pieces of wood from the True Cross that was captured during the Battle of Hattin.
A truce finally came about in 1221 which allowed the Templars to send troops to Spain to assist in the Reconquista.
The Holy Roman Emperor Frederick II attacked Templar and Hospitallier lands after they criticized him for attempting to steal the wealth of the Christian Levant and was, for a time, excommunicated from the Roman Catholic Church.
Montaigu died in January of 1232 from Apoplexy (cerebral hemorrhage). He was succeeded by Armand de Périgord.
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