House of the Dragon, a direct prequel to Game of Thrones, presents an age years before Robert Baratheons rebellion, when House Targaryen reigned over Westeros, with all remaining houses bowing to them. However, even under their leadership, the realm is full of political intrigue and conflict, such as questions of ascendance, marriage, and countless wars that are born out of those. House Hightower is one of the major players in the shows story. This house is known for ruling over Oldtown, the city where the Maesters citadel is located. This, along with Oldtown being the seat of the High Septon, makes House Hightower a powerful and influential player in the political games of Westeros.