House Tyrell

House Tyrell of Highgarden is a Great House of Westeros that rules the vast and fertile region of the Reach from its seat of Highgarden. It is generally seen as one of the most powerful among the Great Houses, due to it's dominion over the Realm's most populous and arguably most resource rich region.

House Tyrell was founded by Ser Alester Tyrell during the Andal Invasion. Serving under the Gardener Kings of the Reach, the Tyrells eventually rose to become High Stewards of Highgarden. Following the death of King Mern IX Gardener at the Field of Fire during the War of Conquest, Harlen Tyrell surrendered Highgarden to Aegon Targaryen. Aegon subsequently rewarded Harlen by making him Lord of Highgarden and Lord Paramount of the Reach, elevating House Tyrell to that of a Great House.

Lord Mace Tyrell officially sided with the Targaryens during Robert's Rebellion, but ultimately did very little to aid the war effort, and unabashedly swore fealty to House Baratheon following it's victory. During the War of the Five Kings, House Tyrell would briefly side with Renly Baratheon, before going over to Joffrey Baratheon following Renly's assassination. Lord Mace's daughter, Margaery Tyrell, would become Queen, marring King Tommen Baratheon after her previous husbands, Renly and Joffrey, were killed before being able to consumate their own marriages to Margaery.

Most of House Tyrell was wiped out in 303 AC during the Destruction of the Great Sept of Baelor, leaving only a handful of Tyrells of lesser branches alive. Theodore Tyrell, the son of Lord Mace's cousin, seized Highgarden in 304 AC after the Lannisters were driven from the Reach following the Battle of the Goldroad. After re-establishing his House's authority, Lord Theodore very reluctantly bent the knee to King Gendry I Baratheon following the Great War. Despite frosty relations under Lord Theodore, upon his death and succession by his son, Luthor Tyrell, House Tyrell once again became an active and significant force at the royal court.

House Tyrell's sigil is a golden rose on a green field, and thier House words are "Growing Strong".