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Slytherin Dungeon

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"We like to feel that our hangout has the aura of a mysterious, underwater shipwreck."
Gemma Farley on the Slytherin Dungeon[src]

The Slytherin Dungeon, also known as the Slytherin Common Room[1], serves as the common room for students in Slytherin house at Hogwarts School of Witchcraft and Wizardry.


The entrance to the common room is located behind a stone wall in the dungeons of Hogwarts Castle. A password is required to enter it; whereupon a passage is revealed leading to the common room.

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The entrance to the Slytherin common room.

Known Passwords

Common Room

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The common room.

The common room is a dungeon-like room with greenish lamps and chairs. This dungeon extends partway under the lake, giving the light in the room a green tinge. The common room has lots of low backed black and dark green button-tufted, leather sofas; skulls; and dark wood cupboards. It is decorated with tapestries featuring the adventures of famous Medieval Slytherins. It has quite a grand atmosphere, but also quite a cold one.

The password to the common room changes every fortnight, and it is posted on the noticeboard. Slytherin students are warned never to bring students from other houses into the common room, or to reveal the password. Supposedly, no outsider has entered the common room for more than seven centuries.[2]



Draco Malfoy, Vincent Crabbe and Gregory Goyle in the common room


In Harry Potter's second year, he and Ron Weasley went into the Slytherin common room disguised as Vincent Crabbe and Gregory Goyle with the aid of Polyjuice Potion to attempt to discover the identity of the Heir of Slytherin. The entry password was "Pure-blood" when Draco Malfoy let them in. The Polyjuice Potion's wearing off prompted Harry and Ron to leave after staying nearly an hour, still not finding out the identity of the Heir of Slytherin.[3]


In 1998, Harry, operating under the alias "Vernon Dudley", attempted to defend his false claim that he was a member of the Slytherin house by describing the location of the Dungeon to the Snatchers.

Behind the scenes


The Slytherin Common Room.

  • In the video game version of Harry Potter and the Chamber of Secrets, there is another way to the common room, where there are several enemies such as Gnomes and Cornish Pixies. There is also a bridge between the Dungeons and the common room, held up by Ectoplasm. A Slytherin student casts Skurge on the Ectoplasm, so you have to find a way to restore the bridge.
  • Revealed in Pottermore: It was revealed that often the giant squid appears at the windows, and sometimes more interesting creatures, and that the sound of swishing water is relaxing at night.
  • In its entry for the Bloody Baron, the glossary on the Scholastic official website mistakenly refers to the Slytherin common room as Slytherin Tower. A similar error is made with the Hufflepuff Basement.
  • If no non-Slytherins have entered the Common Room for seven centuries as of 1991, this means that the last time a non-Slytherin entered it was in the late 13th century.


See also

Notes and references

  1. Harry Potter and the Chamber of Secrets (video game)
  2. Pottermore introduction for Slytherins (transcription available here)
  3. Harry Potter and the Chamber of Secrets
  4. The door of the common room is seen magically appearing and disappearing everytime we come across it.

Hogwarts Castle
Locations below ground floor

Boathouse · Boathouse passageway · Chamber of Secrets · Conical Crypt · Dark Hall · Deathday Party Hall · Defence Against the Dark Arts dungeon · Detention escape route · Dungeons · Dungeon cave · Dungeon Corridor · Dungeon Five · Dungeon hall · Dungeon Pit · Dungeon Staircase · Entrance Dungeon · Forgotten Cavern · Hieroglyphic Hall · Hogwarts Basement · Hufflepuff Basement · Kitchens · Lever Rooms · Lost Tunnel · Lower Chambers Corridor North-East · Lower Chambers Corridor West · Lower Chambers Portrait Corridor · Poltergeist Passage · Porticus Circumscriptus · Porticus Periculum · Porticus Imago · Porticus Medius · Potion-Mixing Room · Potions basement · Potions Classroom · Prowling Passage · Quidditch cave · Room of Doom · Room of Runes · Severus Snape's office · Shop · Slug Pit · Slughorn's Stairs · Slytherin Boys' Dormitory · Slytherin Duelling Dungeon · Slytherin Dungeon · Slytherin Girls' Dormitory · Undercover route to the Kitchens · Underground Chambers · Vestibule of Mischief · Way to Courtyard

Portraits, statues and other artwork located below ground floor

Basil Fronsac · Bloody Baron · Cecilia Gallerani · Elizabeth Burke · Hooky · Mad old man · Mopsus · Old man · Percival Pratt · Salazar Slytherin · Sleeping hermit · Bearded man with book

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