From A Wiki of Ice and Fire
|Title||Archmaester of healing|
|Book||Fire and Blood (mentioned)|
Sandeman was an archmaester of the Citadel.
Sandeman was reputedly the wisest healer in the history of Westeros.
In 136 AC, one of Sandeman's former students, Maester Rowley, became King Aegon III Targaryen's new Lord Confessor.
- ↑ 1.0 1.1 1.2 Fire & Blood, The Lysene Spring and the End of Regency.