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Being bound by prophecy to not take arms against Aegon the Conqueror and his descendants for fear of having Oldtown destroyed doesn't help their plight, making them reluctant to participate in anything war-related, even when Targaryens aren't overtly on the field. The last time they tried to do it led to the Dance of the Dragons. Hundreds of years of being vassals to the lords and kings of the Reach, these being the Gardeners and later the Tyrells note -though the historic rivals of the Tyrells are the Florents-, have led to the Hightowers to seek other ways to climb out of this rut.Their sigil is a stone white watchtower with a fire burning on the top. They have several minor houses sworn to them, including Houses Beesbury, Bulwer, Costayne, Cuy, and Mullendore. The foundation of the tower is built on an ancient black stone structure, the origins of which are unknown.
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Their keep is the Hightower, a massive castle and lighthouse said to be taller than the Wall, located in the middle of the city on Battle Isle. They control the large port city of Oldtown, and played a key role in the establishment of the Citadel, the headquarters of the Maesters, which they continue to support. Before becoming bannermen to House Gardener, the Hightowers ruled as kings, taking the title King of the High Tower. Despite this power, they have a reputation for staying out of conflicts unless absolutely necessary, having been devastated in previous wars like the Dance of the Dragons. An ancient noble house dating back to the time of the First Men (or even before according to Essos), House Hightower is one of the most powerful vassals of House Tyrell, having a large army, navy, and nearly as much wealth as House Lannister, which makes them the most powerful vassal house in the Seven Kingdoms.
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