Three Towers is the seat of House Costayne in the Reach. It sits on a cliff on the southern shore of Whispering Sound, almost where the sound meets the Redwyne Straits.
After Jaehaerys I Targaryen ascended the Iron Throne in 48 AC, Elinor Costayne, a widow of the late King Maegor I Targaryen, returned to her father's seat at Three Towers. In 54 AC, Jaehaerys and Queen Alysanne Targaryen traveled to Oldtown after the death of the High Septon. While awaiting the arrival of Alfyn, the king visited Bandallon, Three Towers, Uplands, Honeyholt, and the Arbor.
Three Towers declared for Rhaenyra Targaryen during the Dance of the Dragons, but Lord Owen Costayne was slain in the Battle on the Honeywine.
A Feast for Crows
The Cinnamon Wind sails past Three Towers on its way to Oldtown. Gilly considers the castle to be very tall.
Etched against the evening stars with torchlight flickering from its windows, the castle made a splendid sight, but he was sad to see it. Their voyage was almost at its end.—thoughts of Samwell Tarly
- ↑ 1.0 1.1 1.2 A Feast for Crows, Chapter 45, Samwell V.
- ↑ Fire & Blood, A Surfeit of Rulers.
- ↑ Fire & Blood, Birth, Death, and Betrayal Under King Jaehaerys I.
- ↑ Fire & Blood, The Dying of the Dragons - The Red Dragon and the Gold.