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{{MagicAwakenedSpoiler}}
{{Pottermoreold}}
 
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{{Youmay|the general description of contents in the Underground Chambers|the detailed history during the [[Skirmish in the Underground Chambers|Attack in the Underground Chambers]]}}
{{Cleanup}}
 
 
{{Location infobox
 
{{Location infobox
  +
|image = B1C17M1 Quirrell and Harry by the Mirror of Erised.png
|bgcolor1=
 
  +
|name = Underground Chambers
|bgcolor2=
 
  +
|location = [[Dungeons]], [[Hogwarts Castle]], [[Scotland]], [[Great Britain]]<ref name="PS16"/>
|imageBG=
 
  +
|owner = [[Hogwarts School of Witchcraft and Wizardry]]<ref name="PS16">{{PS|B|16}}</ref>
|image=
 
  +
|residents = [[Quirinus Quirrell's second mountain troll|Mountain troll]]<ref name="PS16"/>
|name=Underground Chambers
 
  +
|affiliation = [[Hogwarts School of Witchcraft and Wizardry]]<ref name="PS16"/>
|location=[[Dungeons]], [[Hogwarts Castle]], [[Scotland]], [[Great Britain]]
 
|owner=[[Hogwarts School of Witchcraft and Wizardry|Hogwarts]] and [[Hogwarts School of Witchcraft and Wizardry#Support staff|Hogwarts Staff]]
 
|residents=
 
|affiliation=
 
 
}}
 
}}
The '''Underground Chambers'''<ref>[[Pottermore]] - book 1, chapter 16, moment 1</ref> were a series of rooms underneath [[Hogwarts School of Witchcraft and Wizardry]] that served as the defences surrounding the [[Philosopher's Stone]] in the [[1991-1992 school year]]. There were seven chambers in total that contained an obstacle or task that guarded the stone from being stolen.
+
The '''Underground Chambers'''<ref name="pottermore">{{PM}} - [http://www.pottermore.com/writing-by-jk-rowling/underground-chambers Book 1, Chapter 16, Moment 2]</ref> were a series of rooms below [[Hogwarts School of Witchcraft and Wizardry]], serving as the defences protecting the [[Philosopher's Stone]] from [[1 August]], [[1991]] until [[4 June]], [[1992]].<ref name="PS16" /> There were a total of seven chambers, each of which containing an obstacle or task that guarded the Stone and delayed any intruder.<ref name="PS16" />
   
 
==Background==
 
==Background==
In [[1991]], the [[Philosopher's Stone]] became the target of [[Lord Voldemort]] due to its potent ability to return him to full power. Suspecting danger, [[Albus Dumbledore]] set out [[Rubeus Hagrid]] to retrieve the stone from [[Vault 713]] at [[Gringotts Wizarding Bank]] the same day he took [[Harry Potter]] to [[Diagon Alley]]. That same day, [[Quirinus Quirrell]] who was being used as a parasite of [[Lord Voldemort]] broke into the bank, but failed to obtain the stone.
+
In [[1991]], the [[Philosopher's Stone]] became the target of [[Tom Riddle|Lord Voldemort]] due to its potent ability to return him to full power. Suspecting danger, [[Albus Dumbledore]] set out [[Rubeus Hagrid]] to retrieve the Stone from [[Vault 713]] at [[Gringotts Wizarding Bank]] the same day he took [[Harry Potter]] to [[Diagon Alley]]. That same day, [[Quirinus Quirrell]], who was being used as the parasitic host of [[Tom Riddle|Lord Voldemort]], broke into the bank, but failed to obtain the Stone.<ref name="PS16" />
   
  +
Thereafter, Hagrid brought the Stone to Hogwarts as requested, and [[Professor]]s [[Pomona Sprout]], [[Filius Flitwick]], [[Minerva McGonagall]], [[Quirinus Quirrell]] and [[Severus Snape]], as well as Hagrid and Dumbledore themselves, each created their own separate chamber.<ref name="PS16" />
The seven obstacles in the Underground Chambers was then created in [[Hogwarts School]] with the intent of protecting the stone.
 
   
 
==Obstacles==
 
==Obstacles==
  +
{{Main|Skirmish in the Underground Chambers}}<!-- It is formatted so that each obstacle can be navigated from the TOC; with two specific redirects needing the subsection anchors -->
===First obstacle===
 
  +
{|class="wikitable" cellspacing="1" cellpadding="1" width=100%
[[Image:Fluffy.jpg|thumb|200px|left|Rubeus Hagrid's chamber]]
 
{{Dialogue a-b-a|Ron|What do they think they're doing, keeping a thing like that locked up in a school?|Hermione|You don't use your eyes, do you? Didn't you see what it was standing on?|I wasn't looking at its feet! I was a bit preoccupied with its heads... or maybe you didn't notice? There were three!|[[Hermione Granger]] and [[Ronald Weasley]] discussing [[Fluffy]]'s chamber|Harry Potter and the Philosopher's Stone (film)}}
 
 
The only known access way was from a trapdoor in the [[Third Floor Corridor]], which was guarded by the three-headed dog, [[Fluffy]]. This obstacle was set by [[Rubeus Hagrid]]. To get past this, one had to "play a bit of music" and put Fluffy to sleep. Fluffy guarded a trap door that leads to the next obstacle. [[Quirinus Quirrell|Professor Quirrell]] most probably enchanted a harp to put Fluffy to sleep while Harry played a wooden flute.
 
[[Image:Devil.JPG|thumb|170px|right|Pomona Sprout's chamber]]
 
===Second obstacle===
 
{{Dialogue a-b-a-c|Hermione|[[Devil's Snare]], Devil's Snare... What did [[Pomona Sprout|Professor Sprout]] say? It likes the dark and the damp-|Harry|So light a fire!|Yes - of course - but there's no wood!|Ron|HAVE YOU GONE MAD? ARE YOU A WITCH OR NOT?|Getting through the [[Devil's Snare]]'s chamber|Harry Potter and the Philosopher's Stone}}
 
 
After going through the trapdoor, a long drop led to a chamber filled with [[Devil's Snare]], planted by the Herbology teacher, [[Pomona Sprout|Professor Sprout]]. The Devil's Snare was designed to entangle and suffocate any intruders, especially quickly the more the intruder attempts to escape, which Ron foolishly chooses to do despite Hermione's warnings. As the Snare is sensitive to heat and light, Hermione used a charm that created a jet of [[Bluebell flames]] to free Ron.
 
 
===Third obstacle===
 
[[File:Winged keys 03.JPG|thumb|left|[[Filius Flitwick]]'s chamber]]
 
{{Dialogue a-b|Hermione|These birds... they can't be here just for decoration.|Harry|They're not birds! They're keys! Winged keys.|Harry and Hermione upon entering the chamber of winged keys.|Harry Potter and the Philosopher's Stone}}
 
 
A downward sloping passage led to another chamber filled with [[Winged Keys|flying keys]], charmed by [[Filius Flitwick|Professor Flitwick]]. A large wooden door led to another chamber. The door would not open with the use of any charm such as [[Unlocking Charm|Alohomora]], one needed the correct key to get through. To pass, one had to use the [[broomstick]] provided to catch the correct key. However, once airborne, the other keys will try and attack the pursuer.
 
 
[[File:Chess.JPG|thumb|250px|right|Minerva McGonagall's chamber]]
 
 
===Fourth obstacle===
 
{{Dialogue a-b-c-b|Ron|You see it, don't you, Harry? Once I make my move, the Queen will take me. Then you're free to check the King.|Harry|No. Ron, NO!|Hermione|What is it?|He's going to sacrifice himself.|Harry, Ron and Hermione in the chess chamber|Harry Potter and the Philosopher's Stone (film)}}
 
 
The next chamber was dark and resembled a graveyard, it contained a [[Human Chess Game]], enchanted by [[Minerva McGonagall|Professor McGonagall]]. To defeat the game, one had to play themselves across the board and checkmate the King according to the rules of [[Wikipedia:Chess|Chess]]. One cannot simply walk across the board and pass, so an adequate knowledge of [[Wizard's Chess]] was needed to complete this task.
 
 
[[File:Quirrell's Obstacle.png|thumb|200px|left|Quirinus Quirrell's chamber]]
 
===Fifth obstacle===
 
{{Dialogue a-b|Hermione|Go on|Harry|I'm glad we didn't have to fight that one, come on, I can't breathe.|Harry Potter regarding the knocked out Troll|Harry Potter and the Philosopher's Stone}}
 
 
The following chamber contained a [[Mountain Troll]] that needed to be defeated in order to pass. This chamber had a terrible smell to it and it was of great relief to Harry and Hermione that they didn't have to be in there too long. This was provided by Professor Quirrell. When Harry and Hermione got there, the troll was already knocked out thanks to Professor Quirrell.
 
 
===Sixth obstacle===
 
[[File:Potions Riddle.png|thumb|250px|right|Severus Snape's Chamber]]
 
{{Dialogue a-b-a|Hermione|This isn't magic - it's logic - a puzzle. A lot of the greatest wizards haven't got an ounce of logic, they'd be stuck in here forever.|Harry|But so will we, won't we?|Of course not, everything we need is here on this paper. Seven bottles: three are poison; two are wine; one will get us safely through the black fire and one will get us back through the purple|Hermione and Harry discussing the Logic Chamber|Harry Potter and the Philosopher's Stone}}
 
 
The next obstacle guarding the Stone was a logical riddle set by [[Severus Snape|Professor Snape]]. Upon entering the chamber, the doorway through which one entered was blocked by a purple flame. The other entry way leading to the Philosopher's Stone, was blocked with black flame. A table with seven bottles of differing shapes sat in the middle of the room.
 
 
Each bottle contained a liquid, but the bottles were not labelled with their contents. Three were poison, two contained nettle wine, one contained a [[Black Fire Potion|potion]] to safely traverse the black flame, and the last contained a [[Purple Fire Potion|potion]] that allowed passage back through the purple flames. The riddle, when properly worked out, revealed the contents of each bottle, and therefore which one was safe to drink to allow onward progress:
 
 
<center>"''Danger lies before you, while safety lies behind,''</center>
 
<center>''Two of us will help you, whichever you would find,''</center>
 
<center>''One among us seven will let you move ahead,''</center>
 
<center>''Another will transport the drinker back instead,''</center>
 
<center>''Two among our number hold only nettle wine,''</center>
 
<center>''Three of us are killers, waiting hidden in line.''</center>
 
<center>''Choose, unless you wish to stay here for evermore,''</center>
 
<center>''To help you in your choice, we give you these clues four:''</center>
 
<center>''First, however slyly the poison tries to hide''</center>
 
<center>''You will always find some on nettle wine's left side;''</center>
 
<center>''Second, different are those who stand at either end,''</center>
 
<center>''But if you would move onwards neither is your friend;''</center>
 
<center>''Third, as you see clearly, all are different size,''</center>
 
<center>''Neither dwarf nor giant holds death in their insides;''</center>
 
<center>''Fourth, the second left and the second on the right''</center>
 
<center>''Are twins once you taste them, though different at first sight.''" <sup>[[Harry Potter and the Philosopher's Stone|[src]]]</sup></center>
 
 
Based on Hermione's deductions, from left to right, the potions lineup is:
 
#[[Poison]]
 
#[[Nettle wine]]
 
#[[Black fire potion|Potion to move the drinker forward through black flames]]
 
#[[Poison]]
 
#[[Poison]]
 
#[[Nettle wine]]
 
#[[Purple fire potion|Potion to move the drinker backwards through purple flames]]
 
 
As Professor Quirrell presumably travelled through the chamber to reach the Mirror of Erised, he must have had to take the [[Black Fire Potion]] himself, and, as there was only enough potion for one person in the bottle, that would have used it all up. However, he may have taken some of the potion with him when he entered the chambers, and drunk that instead. Another possibility is that the bottles had had a [[Refilling Charm]] on them.
 
 
[[File:Mirror2.JPG|thumb|125px|right|Albus Dumbledore's chamber]]
 
 
===Seventh obstacle===
 
{{Dialogue a-b|Harry|You!|Quirrell|Me, I wondered whether I'd be meeting you here, Potter.|Harry Potter discovering Professor Quirell in the seventh chamber|Harry Potter and the Philosopher's Stone}}
 
 
The final obstacle was the [[Mirror of Erised]], designed and set by [[Albus Dumbledore]]. The only way to obtain the stone was to look into the mirror, see yourself having it, but not using it.
 
 
Most people would see themselves using it, such as turning things to gold, crafting [[Elixir of Life]], or giving it to someone. This is what Quirrell saw. Harry however, was able to get the Stone because he only wanted to save it and not use it.
 
 
==Behind the scenes==
 
*The prevalence of the number [[seven]] is not coincidental; seven obstacles were in place to get to the [[Philosopher's Stone]] and seven different potions were available in Snape's logic riddle. Seven, as deduced by [[Arithmancer]] [[Bridget Wenlock]], has magical properties to it. It is believed that the number seven is the most magical number. It is also, of course, the total number of books in the series, with Rowling firmly sticking to that number.
 
*In the [[Harry Potter and the Philosopher's Stone (film)|film adaption]] of ''[[Harry Potter and the Philosopher's Stone]]'' an [[Undetectable Extension Charm]] were possibly put at the Winged Key Chamber, as it was taller than the Devil's Snare Chamber and Fluffy Chamber together, and it could not be seen from the outside of the [[Hogwarts Castle]].
 
*The fifth and sixth obstacles were cut from the film. This is curious, as Snape was the one who was suspected to want to steal the stone, and Quirrell was the one who actually wanted to. This is also a bit strange because in the film Hagrid still says that Snape is one of the teachers protecting the stone. However, in the film, when the Trio unlocks the door, a bit of the Troll Chamber can be seen, and the Potion Riddle appears on Disc 2. It is possible that the film makers just cut from the Winged Keys Chamber to the Mirror of Erised Chamber.
 
*At one point in the "[[Battle of Hogwarts]]" chapter in ''[[Harry Potter and the Deathly Hallows|Deathly Hallows]]'', Hermione asked Ron ''are you a wizard or not?''. This might have been a reference to what was said in the Devil's Snare Chamber by Ron to Hermione, ''are you a witch or not?''.
 
*In the original script of ''Deathly Hallows'' [[Fluffy]], the first obstacle, was going to participate in the Battle of Hogwarts.
 
*In some video games an antechamber to the Mirror of Erised chamber appears, which makes out eight obstacles. However, it is possible that the antechamber is a part of the last chamber.
 
*In the [[Harry Potter and the Philosopher's Stone (video game)|PS1 version]] of ''[[Harry Potter and the Philosopher's Stone]]'' the Potion Riddle chamber is called ''You-Know-Who''. It is unknown why.
 
*There were a lot of differences in the Chambers between the books, films and video games, shown in the following table:
 
{| border="2" cellpadding="4" cellspacing="1" class="wikitable" style="width: 420px; height: 420px"
 
|-bgcolor="#cccccc"
 
!width="10%"|Room
 
!width="15%"|Book
 
!width="15%"|Film
 
!width="15%"|PC Game
 
!width="15%"|PS1 Game
 
!width="15%"|Pottermore
 
!width="15%"|GBC/GBA Game
 
!width="15%"|LEGO Years 1-4
 
 
|-
 
|-
  +
!<small>Order of encounter</small><br /> 
|'''Fluffy's Chamber and Through the Trapdoor'''
 
  +
Obstacle (Preparer)
|Harry and then Hermione played the flute Hagrid gave Harry for Christmas.
 
  +
!Description
|'''Disc 1:''' Quirrell bewitched a harp to play itself.<br />'''Disc 2:''' The player has to choose between four items: the [[Cloak of Invisibility]], a chicken, a bone or a flute.
 
|Harry plays the flute Hagrid gave him and has to put all 3 heads asleep at once; the heads will wake up once asleep enough.
 
|Harry plays the flute Hagrid gave him.
 
| style="text-align: center"|Not seen.
 
|Same as PS1.
 
|'''Desktop:''' When Harry, Ron and Hermione enter the room to see Quirrell climb into the room, when he finds out they have seen him he destroys the playing harp and wakes Fluffy. Ron tries playing a [[Trumpet|trumpet]] but it doesn't work. In order to fix the harp they have to distract Fluffy with a [[Rubber duck|rubber duck]].<br />'''Handheld:''' When Harry, Ron and Hermione enter the room to see Quirrell climb into the room, when he finds out they have seen him he destroys the playing harp and wakes Fluffy. Ron tries playing a [[Trumpet|trumpet]] but it doesn't work. Fluffy then chase Harry through the Third Floor until Harry jumps through the trapdoor.
 
 
|-
 
|-
  +
!
|'''[[Devil's Snare]]'''
 
  +
=====First=====
|The three are grabbed by the Devil's Snare; Hermione defeats it with [[Bluebell flames]].
 
  +
[[Fluffy]] ([[Rubeus Hagrid]])
|'''Disc 1:''' The three are grabbed by the Devil's Snare; Hermione's directions were to relax, after which the plant would release Harry and Ron. However, Ron, being the last one trapped, and being afraid, couldn't calm himself enough leading Hermione to cast [[Lumos Solem]], allowing Ron to slip through.<br />'''Disc 2:''' Not seen.
 
  +
[[File:Fluffy PM B1C9M3 ForbiddenCorridorFluffy Moment.jpg|240px]]
|Only Ron and Hermione are grabbed by the Devil's Snare; Harry defeats it with the [[Fire-Making Spell]].
 
  +
|The only known way to access the Stone was through a trapdoor in the [[third-floor corridor]], which was guarded by the [[three-headed dog]] [[Fluffy]]. To get past this obstacle, one had only to play some music, which would then put Fluffy to sleep.<ref name="PS16" />
|Same as PC.
 
| style="text-align: center"|Not seen.
 
|'''GBC:''' Only Ron and Hermione are grabbed by the Devil's Snare and Harry defeats it in a duel.<br />'''GBA:''' Only Ron and Hermione are grabbed by the Devil's Snare; Harry defeats it by burning it with torches.
 
|'''Desktop:''' Only Ron is grabbed by the Devil's Snare; Harry defeats it with the [[Wand-Lighting Charm]].<br />'''Handheld:''' Not seen.
 
 
|-
 
|-
  +
!
|'''[[Winged Keys]]'''
 
  +
=====Second=====
|Harry, Ron and Hermione catch the key.
 
  +
[[Devil's Snare]] ([[Pomona Sprout]])
|'''Disc 1:''' Harry catches the key.<br />'''Disc 2:''' You must search and click on the right winged key.
 
  +
[[File:Devil.JPG|240px]]
|Same as film.
 
  +
|Through the trapdoor and a long and dark drop through the air, led into a chamber full of [[Devil's Snare]]. The plant was designed to entangle and suffocate any intruders, especially quickly the more the intruder tries to escape. [[Bluebell Flames]], however, could be used to scorch them.<ref name="PS16" />
|Same as film. However, the wrong keys shine red and the right key shine blue and it's wing is not broken.
 
| style="text-align: center"|You must search and click on the right winged key.
 
|Same as film.
 
|'''Desktop:''' Same as film, except for the fact that Harry shoot spells at the key.<br />'''Handheld:''' Harry finds the hideout of the key, then same as film.
 
 
|-
 
|-
  +
!
|'''[[Human Chess Game|Giant Chess Board]]'''
 
  +
=====Third=====
|Harry is a bishop, Hermione is a rook, Ron is a Knight and is injured after sacrificing the Knight in order to win.
 
  +
[[Winged Keys]] ([[Filius Flitwick]])
|Same as book, except Ron rides the Knight instead of taking its place.
 
  +
[[File:B1C16M1.jpg|240px]]
|Ron defeats most of the pieces and gets injured, Harry defeats the rest, Hermione doesn't play and Harry and Ron need to get the pieces to attack each other, but not attack them.
 
  +
|A downwards sloping passage with stone walls, through which trickling water could be heard, led to a brilliantly lit chamber with a very high ceiling, full of glittering winged keys. On the opposite end of the chamber from the stone passage was a large, old-fashioned wooden door with a silver lock that would not open, even with the [[Unlocking Charm|Alohomora Charm]], without the necessary key. One had to mount a [[Broomstick|broom]] and attempt to pursue the correct key; all of the keys fluttered away quickly, darting around, making it very difficult to catch the correct one.<ref name="PS16" />
|There are three boards; Ron defeats most of the pieces on the first board and gets injured, Harry defeats the rest, Hermione doesn't play.
 
| style="text-align: center"|You just see a few pieces move around.
 
|'''GBC:''' Ron defeats the Queen and gets injured, Harry defeats the rest, Hermione doesn't play.<br />'''GBA:''' Harry paralyses all the pieces on top of the door-opening platforms, realising the lack of pieces to all the platforms, Ron stays on top of the last one.
 
|'''Desktop:''' After directing the pieces on the board where to move and winning, Ron trips over the King's sword and watches the doors close after Harry and Hermione enter next room.<br />'''Handheld:'''Ron gets injured from start, Harry have to answer three questions in order to make the pieces move and win.
 
 
|-
 
|-
  +
!
|'''Mountain Troll Chamber'''
 
  +
=====Fourth=====
|The Troll is already collapsed on the floor when Harry and Hermione arrive.
 
  +
[[Chessboard Chamber]]<br />([[Minerva McGonagall]])
|Not seen. However a bit of the Chamber is shortly seen.
 
  +
[[File:B1C16M2 Chessboard Chamber.png|240px]]
|Not seen.
 
  +
|{{Quote|I think we're going to have to be chessmen.|Ron|Harry Potter and the Philosopher's Stone}}This chamber was so dark that it was impossible to see anything. It contained a [[Chessboard Chamber|Human Chess Game]]. To get across the chamber, one had to checkmate the King according to the rules of [[Wizard's Chess]].<ref name="PS16" />
|The Troll was collapsed but wakes up when Harry and Hermione get there. The Troll is still groggy so while Hermione tries to unlock the next door, Harry levitates the litter present in the room from out of the Troll's way, without making noise. The Troll doesn't notice a hole on the floor and falls into it.
 
|Not seen.
 
|'''GBC:''' Same as book.<br />'''GBA:''' Not seen.
 
|'''Desktop:''' Not seen. However a bit of the Chamber is shortly seen.<br />'''Handheld:''' Not seen.
 
 
|-
 
|-
  +
!
|'''Potion Riddle'''
 
  +
=====Fifth=====
|Hermione solves the riddle; Harry goes through the Black Flames, Hermione goes through the Purple Flames to go get help as there is only enough potion for one of them to go through the black flames.
 
  +
[[Mountain troll]] ([[Quirinus Quirrell]])
|'''Disc 1:''' Not seen.<br />'''Disc 2:''' The player must click on the right potion.
 
  +
[[File:Trollps1.jpg|240px]]
|Harry solves the riddle by watching the 7 containers move, and must select the one that has the correct potion; Harry goes through the Black Flames, the Purple Flames disappear.
 
  +
|{{Quote|I do say I have a gift with trolls.|Quirrell discussing his chamber|Harry Potter and the Philosopher's Stone}}A chamber containing a [[Troll in the Underground Chambers|mountain troll]] at the entrance; it had a foul odour in it, and it was said that there was great relief in passing through it.<ref name="PS16" />
|Harry has to guess which knight has the [[Ice Potion]].
 
|You must read the riddle and figure out the correct two potions.
 
|'''GBC:''' Harry has to mix and brew the potion, solving the riddle.<br />'''GBA:''' Harry and Hermione have to look for the four potion ingredients, scattered trough the dungeon.
 
|'''Desktop:''' Not seen.<br />'''Handheld:''' Not seen.
 
 
|-
 
|-
  +
!
|'''[[Mirror of Erised]] Antechamber'''
 
  +
=====Sixth=====
|Not seen
 
  +
[[Potion riddle]] ([[Severus Snape]])
|Not seen
 
  +
[[File:Potions Riddle.png|250px]]
|Harry has to push the blocks to get to the [[Mirror of Erised]] room, while Quirrell pushes the blocks back at him and tries to curse him.
 
  +
|Upon entering the chamber, the entrance was blocked by [[purple flames]], whilst the exit was covered by [[black flames]]. A table holding seven unlabelled [[potion]] bottles of differing shapes and sizes sat in the centre of the room, with a logical riddle. Three were [[poison]], two contained [[nettle wine]], one contained a [[Fire Protection Potion|potion]] to safely traverse the black flame, and the last contained a [[Fire Protection Potion|potion]] that allowed passage back through the purple flames. The riddle, when properly worked out, revealed the contents of each bottle, and therefore which one was safe to drink to allow onward progress.<ref name="PS16" />
|Quirrell brings suits of armour to life and summons one gigantic suit of armour.
 
|Not seen
 
|'''GBC:''' Harry duels with Quirrell.<br />'''GBA:''' Harry dodges Quirrell's curses, making him destroy the floor. Then, they both fall into the [[Mirror of Erised]] Chamber.
 
|Not seen.
 
 
|-
 
|-
  +
!
|'''[[Mirror of Erised]] Chamber'''
 
  +
=====Seventh=====
|Harry struggles against Quirrell and Voldemort, but passes out before Quirrell dies.
 
  +
[[Mirror of Erised]] ([[Albus Dumbledore]])
|Harry struggles against Quirrell and Voldemort, watches Quirrell die, and passes out when Voldemort's soul passes through him.
 
  +
[[File:Quirrell and Harry by the Mirror of Erised.png|250px]]
|Harry tries to kill Quirrell/Voldemort by collapsing pillars on top of him and he also tries to deflect Voldemort's curses with the Mirror. Harry passes out at the same time Quirrell dies. Dumbledore then bursts in to the room.
 
  +
|{{Quote|You see... Only a person who wanted to find the stone. Find it, but not use it, would be able to get it.|Albus Dumbledore|Harry Potter and the Philosopher's Stone}}The chamber contained the [[Mirror of Erised]]. The [[Albus Dumbledore's unidentified charm on the Mirror of Erised|only way]] to obtain the stone was for an individual to look into the mirror and see themselves possessing the stone but not using it.<ref name="PS17">{{PS|B|17}}</ref>
|Harry tries to kill Quirrell/Voldemort by collapsing pillars on top of him and he also tries to boost his jinxes with the Mirror, and then directing it to Voldemort. Harry watches Quirrell die.
 
|You must find the Philosopher's Stone. (It was in [[Harry Potter|Harry]]'s pocket.)
 
|'''GBC:''' Harry duels with Voldemort and passes out when he touches him. He doesn't see Quirrell die.<br />'''GBA:''' Harry deflects Voldemort's curses with the Mirror and passes out when he touches him. He doesn't see Quirrell die.
 
|'''Desktop:''' Harry battles with Quirrell, hurling his own green cursed heads back at him, after touching him 3 times Quirrell burns away and Harry passes out.<br />'''Handheld:''' Harry has to lit the torches to make the fire graves bubble with lava. Then some blocks appear, but when destroyed let go of a heavy object that knocks Quirrell out (Harry does this 3 times).
 
 
|}
 
|}
  +
  +
==Behind the scenes==
  +
*The prevalence of the number [[seven]] is not coincidental; seven obstacles were in place to get to the [[Philosopher's Stone]] and seven different potions were available in Snape's logic riddle. Seven, as deduced by [[Arithmancer]] [[Bridget Wenlock]], has magical properties to it. It is believed that the number seven is the most magical number. It is also, of course, the total number of books in the series, (with Rowling firmly sticking to that number), and the number of pieces Voldemort desired his soul to be in (as he recognised the significance of the number seven and believed it to be the greatest).
  +
*The fifth and sixth obstacles were cut from {{PS|FA}}.
  +
**The [[potion riddle]], however, was later shown in the second disc.
  +
**The potion riddles and other obstacles cut from the film do appear in the different versions of the [[Harry Potter and the Philosopher's Stone (video game)|game]].
   
 
==Appearances==
 
==Appearances==
  +
{{Imagecat|Images of the Underground Chambers}}
*''[[Harry Potter and the Philosopher's Stone]]''
 
  +
*{{PS}} {{1st}}
*''[[Harry Potter and the Philosopher's Stone (film)]]''
 
  +
*{{PS|F}}
*''[[Harry Potter and the Philosopher's Stone (video game)]]''
 
  +
*{{PS|G}}
*''[[LEGO Harry Potter: Building the Magical World]]''
 
  +
*{{LEGO|C1}}
*''[[LEGO Harry Potter: Characters of the Magical World]]'' {{Mention}}
 
  +
*{{LEGO|B}}
*''[[LEGO Harry Potter: Years 1-4]]''
 
  +
*{{LEGO|C}} {{Mention}}
*''[[Pottermore]]''
 
  +
*{{LEGO|Y1}}
*''[[LEGO Harry Potter|Harry Potter LEGO Sets]]''
 
  +
*{{LEGO}}
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==Notes and references==
 
==Notes and references==
 
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{{Reflist}}
 
 
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{{Hogwarts below ground floor}}
   
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[[Category:Underground Chambers]]
 
[[Category:Underground Chambers]]

Latest revision as of 16:20, 18 May 2023

The Underground Chambers[2] were a series of rooms below Hogwarts School of Witchcraft and Wizardry, serving as the defences protecting the Philosopher's Stone from 1 August, 1991 until 4 June, 1992.[1] There were a total of seven chambers, each of which containing an obstacle or task that guarded the Stone and delayed any intruder.[1]

Background

In 1991, the Philosopher's Stone became the target of Lord Voldemort due to its potent ability to return him to full power. Suspecting danger, Albus Dumbledore set out Rubeus Hagrid to retrieve the Stone from Vault 713 at Gringotts Wizarding Bank the same day he took Harry Potter to Diagon Alley. That same day, Quirinus Quirrell, who was being used as the parasitic host of Lord Voldemort, broke into the bank, but failed to obtain the Stone.[1]

Thereafter, Hagrid brought the Stone to Hogwarts as requested, and Professors Pomona Sprout, Filius Flitwick, Minerva McGonagall, Quirinus Quirrell and Severus Snape, as well as Hagrid and Dumbledore themselves, each created their own separate chamber.[1]

Obstacles

Order of encounter
 

Obstacle (Preparer)

Description
First

Fluffy (Rubeus Hagrid) Fluffy PM B1C9M3 ForbiddenCorridorFluffy Moment

The only known way to access the Stone was through a trapdoor in the third-floor corridor, which was guarded by the three-headed dog Fluffy. To get past this obstacle, one had only to play some music, which would then put Fluffy to sleep.[1]
Second

Devil's Snare (Pomona Sprout) Devil

Through the trapdoor and a long and dark drop through the air, led into a chamber full of Devil's Snare. The plant was designed to entangle and suffocate any intruders, especially quickly the more the intruder tries to escape. Bluebell Flames, however, could be used to scorch them.[1]
Third

Winged Keys (Filius Flitwick) B1C16M1

A downwards sloping passage with stone walls, through which trickling water could be heard, led to a brilliantly lit chamber with a very high ceiling, full of glittering winged keys. On the opposite end of the chamber from the stone passage was a large, old-fashioned wooden door with a silver lock that would not open, even with the Alohomora Charm, without the necessary key. One had to mount a broom and attempt to pursue the correct key; all of the keys fluttered away quickly, darting around, making it very difficult to catch the correct one.[1]
Fourth

Chessboard Chamber
(Minerva McGonagall) B1C16M2 Chessboard Chamber

"I think we're going to have to be chessmen."
— Ron[src]
This chamber was so dark that it was impossible to see anything. It contained a Human Chess Game. To get across the chamber, one had to checkmate the King according to the rules of Wizard's Chess.[1]
Fifth

Mountain troll (Quirinus Quirrell) Trollps1

"I do say I have a gift with trolls."
— Quirrell discussing his chamber[src]
A chamber containing a mountain troll at the entrance; it had a foul odour in it, and it was said that there was great relief in passing through it.[1]
Sixth

Potion riddle (Severus Snape) Potions Riddle

Upon entering the chamber, the entrance was blocked by purple flames, whilst the exit was covered by black flames. A table holding seven unlabelled potion bottles of differing shapes and sizes sat in the centre of the room, with a logical riddle. Three were poison, two contained nettle wine, one contained a potion to safely traverse the black flame, and the last contained a potion that allowed passage back through the purple flames. The riddle, when properly worked out, revealed the contents of each bottle, and therefore which one was safe to drink to allow onward progress.[1]
Seventh

Mirror of Erised (Albus Dumbledore) Quirrell and Harry by the Mirror of Erised

"You see... Only a person who wanted to find the stone. Find it, but not use it, would be able to get it."
— Albus Dumbledore[src]
The chamber contained the Mirror of Erised. The only way to obtain the stone was for an individual to look into the mirror and see themselves possessing the stone but not using it.[3]

Behind the scenes

  • The prevalence of the number seven is not coincidental; seven obstacles were in place to get to the Philosopher's Stone and seven different potions were available in Snape's logic riddle. Seven, as deduced by Arithmancer Bridget Wenlock, has magical properties to it. It is believed that the number seven is the most magical number. It is also, of course, the total number of books in the series, (with Rowling firmly sticking to that number), and the number of pieces Voldemort desired his soul to be in (as he recognised the significance of the number seven and believed it to be the greatest).
  • The fifth and sixth obstacles were cut from the film adaptation of Harry Potter and the Philosopher's Stone.
    • The potion riddle, however, was later shown in the second disc.
    • The potion riddles and other obstacles cut from the film do appear in the different versions of the game.

Appearances

Wiki
The Harry Potter Wiki has 26 images related to Underground Chambers.

Notes and references

Below the ground floor of Hogwarts Castle
Classrooms
Alchemy Class · Defence Against the Dark Arts dungeon · Potion-Mixing Room · Potions Classroom
Common Rooms
Hufflepuff Basement · Hufflepuff Boys' Dormitory · Hufflepuff common room · Hufflepuff Girls' Dormitory · Slytherin Boys' Dormitory · Slytherin common room · Slytherin Dungeon · Slytherin Girls' Dormitory
Corridors
Boathouse passageway · Corridor of Secrets · Dungeon cave · Dungeon Corridor · Forgotten Cavern · Hidden Herbology Corridor · Hieroglyphic Hall · Kitchen corridor · Lost Tunnel · Lower Chambers Corridor North-East · Lower Chambers Portrait Corridor · Lower Chambers Corridor West · Poltergeist Passage · Porticus Circumscriptus · Porticus Periculum · Porticus Imago · Porticus Medius · Prowling Passage · Quidditch cave · Secret way to Slytherin common room · Slytherin Corridors · Undercover route to the Kitchens · Unexplored passage to Hogsmeade · Way to Courtyard · Way to the Forbidden Forest
Halls and rooms
Athenaeum · Bottom of the Well · Campaign Room · Cauldron Room · Chamber of Secrets · Conical Crypt · Dark Hall · Deathday Ballroom · Deathday Party Hall · Duelling Room · Dungeons · Dungeon Chamber · Dungeon Five · Dungeon foyer · Dungeon hall · Dungeon Pit · Dungeon Portrait Room · Forgotten Dungeons · Grate Chamber · Kitchens · Map Chamber · Potions Classroom adjoining room · Potions Classroom dungeons · Room of Doom · Room of Runes · Shop · Slug Pit · Slytherin Duelling Dungeon · Undercroft · Vestibule of Mischief · Werewolf Saga Tapestries room
Offices
Secret study beneath Greenhouse One · Severus Snape's office · Slytherin's Scriptorium
Other locations
Boathouse · Dungeons cell · House-Elf Living Quarters · Lever Rooms · Lower Hogwarts Castle · Keepers' Caverns · Troll Bedroom · Underground Chambers
Portraits, statues and other artwork
Basil Fronsac · Bearded man with book · Bloody Baron · Cecilia Gallerani · Charles Rookwood · Emily · Elizabeth Burke · Hooky · Horace Slughorn · Howard · Mad old man · Mopsus · Niamh Fitzgerald · Old man · Percival Pratt · Percival Rackham · San Bakar · Salazar Slytherin · Sleeping Dragon Statue · Sleeping hermit · Slytherin Dungeon tapestries · Urn of Ashes
Staircases
Detention Escape Route · Dungeon foyer exit · Dungeon Staircase · Grand Staircase · Slughorn's Staircase · Slughorn's Stairs · Staircase to the Quad
Storerooms
Basement · Firefly Room · Neville Longbottom's storeroom · Potions basement · Store Room · Troll Storeroom