Guillaume de Chateauneuf

However, the date of his death is not known; he was already replaced by his successor Hugues de Revel on 9 October 1258, but he was still in office on 20 February 1258 and most probably died in the summer of 1258.

This Turkish tribe, which had invaded Mesopotamia, was called by the Sultan of Egypt: they seized Tiberias, Safed and Tripoli and began the Siege of Jerusalem on 15 July 1244, where the walls were very inadequate following the agreement between Frederick II and al-Kamil.

[3] The patriarch of Jerusalem, Robert of Nantes, and the Grand Masters of the Temple and the Hospitallers, having come to raise the courage of the inhabitants, repelled the attackers but the imperial lord and the great tutor of the Hospital lost their lives in the battle.

He had been the Grand Tutor of the Hospital during the battle of La Forbie, and became lieutenant ad interim while waiting for the release of de Chateauneuf.

[3] The loss of Jerusalem and the defeat at La Forbie essentially eliminated Western military power in the Holy Land.

In 1256, a ten-year truce was concluded between Aybak, effectively ruler of Egypt, an-Nasir Yusuf, sultan of Damascus, and the barons of the Holy Land, the Knights Templar and the Hospitallers, the king of France, represented by Geoffrey of Sergines, and the Count of Jaffa, John of Ibelin.