The castle of Toron was built by Hugh of St. Omer, second prince of Galilee, to help capture Tyre. After Hugh's death it was made an independent seigneury, given to Humphrey I in 1107. The lords of Toron tended to be very influential in the kingdom; Humphrey II was constable of Jerusalem. Humphrey IV was married to Isabella, Amalric I's daughter (Toron passed into the "royal domain" during their marriage, and was then captured by Saladin, but its title was returned to Humphrey IV after their divorce). It was also one of the few to have a straight hereditary succession in male line, at least for some generations. The lords of Toron were also connected to the Lordship of Oultrejordain by the marriage of Humphrey III and the maternal inheritance of Humphrey IV. Toron was later merged with the royal domain of Tyre which went to a branch of Antioch, then their heirs from Montfort. Toron was lost in 1266.