|Title|| Lord of the Hightower|
Lord of the Port
Voice of Oldtown
Defender of the Citadel
Beacon of the South
|Book(s)|| The World of Ice & Fire (mentioned)|
The Sons of the Dragon (mentioned)
Martyn's daughter, Ceryse, was married to Prince Maegor Targaryen in 25 AC, after Ceryse's uncle, the High Septon,[N 1] protested the proposed marriage between Maegor and his cousin, Princess Rhaena Targaryen.
In 43 AC[N 2] when King Maegor, Queen Dowager Visenya, their dragons, and the royal army made their way to Oldtown during the Faith Militant uprising, Lord Martyn called his banners with a fire atop the Hightower. By the morning of their arrival, however, the city gates were open, and the banners of House Targaryen, House Tyrell and House Hightower flew atop the city walls. After word of the sudden death of the High Septon reached him, Lord Martyn at once dispatched his own knights to arrest disarm and arrest arrested all of the Warrior's Sons, including his brother Morgan. Then, Lord Martyn sent his men to rouse the Most Devout from their beds and march them at spearpoint to the Starry Sept to choose a new High Septon.
In 47 AC, Princess Rhaella was made a ward of Lord Martyn when she was sent to Oldtown by King Maegor to be raised as a septa. In the following year when her mother, Queen Rhaena fled from Maegor in the night, Maegor sent a rider to Oldtown commanding Lord Martyn to behead Rhaella as punishment for her mother's betrayal. Lord Martyn refused and imprisoned the messenger instead, he then declared support for Jaehaerys I Targaryen. 
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