Perhaps in preparation for their crossing of the narrow sea, the Valyrians also established their westernmost outpost on the isle that would come to be known as Dragonstone some two hundred years before the Doom. No king opposed them—and though the local lords of the narrow sea made some effort to resist it, the strength of Valyria was too great. With their arcane arts, the Valyrians raised the Citadel at Dragonstone.