This placed the lordship of Tibnin in the hands of the French Baron Philip of Montfort, who arrived in Upper Galilee as one of the few knights to make it to the Holy Land in the aftermath of the Fourth Crusade, which had been initially launched under the leadership of Theobald of Champagne and had ended by conquering Constantinople. Montfort married Maria of Antioch-Armenia, the last remaining heiress to the Toron family, and seized the riches of Tibnin and its castle and imposed a tax on caravans using the spring beneath the castle. It was from Tibnin that Philip of Montfort would contemplate ways to seize Tyre from the hands of Richard Filangieri, who was the confidant of Frederick II.