Highgarden

Highgarden is the stronghold of House Tyrell.

Notable residents of the castle

 * Lady Olenna Tyrell, known as the Queen of Thorns, the dowager-lady of the house.
 * Lord Mace Tyrell, the ruler of House Tyrell, eldest son of Lady Olenna.
 * Willas Tyrell, Mace's eldest son and heir.
 * Garlan Tyrell, Mace's second son and a formidable warrior.
 * Margaery Tyrell, Mace's only daughter, reputed to be a beautiful maiden, close to her brother Loras, currently serving in King's Landing.

In the books
In the Song of Ice and Fire novels, Highgarden is amongst the most attractive of the great castles, located close to the River Mander with immense gardens located within its strong, tiered walls.

Highgarden was originally the seat of House Gardner, the house of the Kings of the Reach, until the invasion of Aegon the Conqueror. King Mern IX Gardner and all his issue were slaughtered by Aegon's dragons on the Field of Fire, so Aegon raised the Tyrells, the stewards of Highgarden, to rule over Highgarden and the Reach. This sparked off a long-standing complaint from House Florent of Brightwater Keep, who claimed a superior blood-link to the Gardners, though this has been constantly dismissed by later kings.