Alchemists' Guild

The Alchemists ' Guild is an organisation based in the city of King's Landing, concerned with matters relating to fire. They are an ancient guild which used to be extremely influential during the reign of House Targaryen, but they have become much more obscure under the reign of King Robert Baratheon.

Members of the Alchemist's Guild are known as pyromancers. A fully-ranked member is called a 'wisdom'. Newly-inducted recruits are called 'apprentices' and mid-ranking members are called 'acolytes'.

The current head of the Alchemists' Guild is Wisdom Hallyne.

In the books
In the Song of Ice and Fire novels, the Alchemists' Guild of King's Landing is an old and honored institution which exerted significant power and influence under the Targaryens, reaching the zenith of their power during the reign of the Mad King, when the head of the Guild, Lord Rossart, even served as the Hand of the King during the final days of Robert's Rebellion (he was slain during the sack of the city). Aerys' love of burning people alive saw him make much use of the alchemists' skills, but King Robert had little use for them and they faded away in terms of power and influence after Aerys' death.

The alchemists also used to boast that they had powers even the maesters of the Citadel did not have, such as the ability to transmute metals. However, they have not demonstrated this ability in living memory and many of their claims are today regarded as fanciful.

In the books the alchemists are based at a guildhall at the foot of Rhaenys' Hill in King's Landing.