Grand Maester Aethelmure was a maester of the Citadel, who, at an unknown time, served as Grand Maester. A biography was written about his life.
Books
A Game of Thrones
A copy of Aethelmure's biography is held in the library at Winterfell. During the visit of Tyrion Lannister, Septon Chayle falls asleep over a copy of the book.