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Harry Potter Wiki

The First-Floor Girls' Toilets[2] was a lavatory located on the first floor of Hogwarts Castle. It was in this lavatory that Harry Potter and Ronald Weasley saved Hermione Granger from a mountain troll, marking the beginning of their friendship.[3]



After a Charms class in the morning of 31 October, 1991, Ron, angry at Hermione for lecturing him on the proper pronunciation of Wingardium Leviosa, insulted her behind her back. Hermione, still in earshot, became upset and headed to this lavatory to cry. She remained in the bathroom all that day.[3]

Later that night, Quirinus Quirrell let a mountain troll into Hogwarts Castle, hoping to create a diversion long enough for him to steal the Philosopher's Stone. The troll eventually made its way from the dungeons up to the first floor, heading into this bathroom. Harry and Ron, who had been looking for Hermione to warn her about the troll, locked it inside before realising the room was the same bathroom Hermione was in.[3]

Unlocking the door and running into the room, Harry and Ron found the troll approaching Hermione, destroying the sinks along the wall as it walked. Harry managed to successfully distract the troll by jumping on its back and shoving his wand up the troll's nose. Thinking quickly, Ron then proceeded to knock out the troll by using the previously mastered Levitation Charm to hit it in the head with its own club.[3]

The commotion caused by this altercation caused several staff members, including Minerva McGonagall, to discover what had happened. After some consideration, the three ended up gaining a net increase of five house points for their adventure, and were sent back to their common room. The lavatory was presumably repaired afterward.[3]


Notes and references

First-floor of Hogwarts Castle
First-floor girls' toilets · Moaning Myrtle's bathroom
Class 1 · Classroom 1A · Classroom 1C · Classroom 1D · Classroom 1E · Classroom 4F · Classroom used for storage · Classroom with maps of Great Britain and Ireland · Muggle Studies Classroom
First-floor corridor · Library corridor · Passage of the Fouls · Tapestry Corridor
Halls and rooms
Detention Chamber · East Wing · Hospital wing · Library · Rear Hall · Severus Snape's storeroom
Minerva McGonagall's office · Poppy Pomfrey's office
Other locations
Stone Bridge
Portraits, statues and other artwork
Bearded man · Elizabeth Burke · Count · Fat Friar · Female nurse · Male nurse · Beaumont Marjoribanks · Hengist Rawkes · Scholar · Google Stump
Staircase to the second-floor corridor · Staircase to the Serpentine Corridor · Staircase to the library corridor