Highgarden, seat of House Tyrell
Highgarden was once the seat of House Gardener, until Aegon the Conqueror defeated King Mern IX Gardener and his host on the Field of Fire, ending their line. When Aegon then marched his host to Highgarden, its steward, Harlen Tyrell, surrendered the castle. For this, Aegon has given him the castle and gave the House Tyrells dominion over the Reach (x).
