The Citadel is an impressive structure in the city of Oldtown and is home to all maesters. Here maesters undergo their training, from the time they arrive as novices until they have achieved the title of Maester, and earn the links in their collars. At the entrance to the Citadel are green marble sphinxes.
The perceived “master” of any area of study is given a mask, ring or rod, and the title Archmaester in the corresponding metal to signify his expertise. An archmaester who specializes in ravenry will have a mask, ring or rod made of black iron. Archmaesters are the senior members of the Order and are given the right to sit on the Conclave. The Conclave is the governing body of the Citadel and is the same body that elects the Grand Maester, the senior member of the Order and its representative to the King. All the meetings of the Conclave are confidential in nature and conducted behind closed doors at the Citadel only.
The Grand Maester wears many interwoven chains to indicate his office as advisor to the King, but these do not reflect his true studies.