A stronghold carved from a mountain overlooking the harbor-city of Lannisport and the sea beyond, Casterly Rock is the ancestral seat of House Lannister. According to popular legend, the hero known as Lann the Clever tricked the Casterlys into giving up the Rock, and took it for himself. The Rock is renowned as one of the strongest castles of the Seven Kingdoms. It was held by Lord Tywin Lannister prior to the War of the Five Kings, but after his death, Queen Regent Cersei Lannister made one of her cousins castellan of the castle.
Upon the death of her father, and with the unavailability of her brothers, Cersei Lannister has been acknowledged as Lady of Casterly Rock by her uncle Kevan.