|House Oldflowers' Ancestral Home|
|Location||The Reach, Westeros|
|Government||House Oldflowers, Feudal Lord|
|Religion||Faith of the Seven|
Sommerset encompasses lands located southwest of Highgarden along the Mander River, which forms a portion of its northern border. Brightwater Keep sits to the west of Sommerset, with Honeyholt to the south, and Horn Hill to the east.
Sommerset has always stood as the seat of House Oldflowers in the Reach. The land was gifted to Gawen Flowers, the natural son of Garth VII Gardener, also called Garth Goldenhand. Being the first bastard born to the Goldenhand during his exceptionally long reign, he eventually became known as Gawen Oldflowers to distinguish him from other, later bastard offspring.
Gawen proved to be a competent commander and administrator in his father's service, and was awarded the Lordship of Sommerset for his role in the campaign against the Ironborn in the Shield Islands.
Sommerset lies just south of the Mander River, which encompasses a portion of the northen border of House Oldflowers' lands.