Pottermore Wiki

Introduction[]

One of the rooms off the main hall in the Department of Mysteries is the Brain Room. Empty but for a few desks and an enormous glass tank filled with a deep green liquid, which is filled with a number of pearly-white brains.

From the Story[]

Harry Potter and the Order of the Phoenix[]

Discovered in chapter 34, The Department of Mysteries[]

The Brain Room is the first room Harry and members of the DA enter when they try different doors in the Department of Mysteries. Hermione marks the door to the room with the incantation Flagrate to show they have been there already.