The Gryffindor Common Room is located located high up on the Fourth Floor. The common room has windows, a fireplace, tables and squashy armchairs. Girls are permitted to enter the boys' dormitories, but boys cannot visit the girls', because the Hogwarts founders felt that boys were less trustworthy than girls. Moderator: Lucius Malfoy
Once used for 'Dumbledore's army'; Located opposite an enormous tapestry depicting Barnabas the Barmy attempting to train trolls for the ballet, the Room of Requirement appears only when someone is in need of it. To make it appear, one must walk past its hidden entrance three times while concentrating on what is needed. The room will then appear, outfitted with whatever is required. Moderator: Lucius Malfoy
The library contains tens of thousands of books on thousands of shelves. The different sections include an Invisibility Section, a section on dragons and the Restricted Section at the very back, barred by a rope. Students need a signed note of permission from a teacher to peruse the Restricted Section, as it holds books about powerful Dark subject matter that is never taught at Hogwarts, and is only used by older students studying advanced Defence Against the Dark Arts. Moderator: Lucius Malfoy
The Ravenclaw Common Room is located on the top floor on the west side. The room is made of stone and is pretty cold during the winter, although the massive fire in here keeps the place warm for the students. Moderator: Lucius Malfoy