Crak de Montreal (Jordan) - built in 1115 by Baldwin I of Jerusalem. The knights of the castle controlled the commerce of the area, as pilgrims and merchants needed permission to travel past. Saladin, who invaded the kingdom in 1187, laid siege to Montreal for two years, but was unable to use siege engines because of the hill. It is said that, during the siege, the defending crusader knights sold their wives and children for food. The castle finally fell to Saladin in May 1189.