Defence Against the Dark Arts staircase

This staircase is one of the largest staircases in Hogwarts Castle. It is located in the Defence Against the Dark Arts tower starting on the ground floor and going to the top of the tower. At the bottom is the One-Eyed Witch Passage, on the second floor is the Defence Against the Dark Arts professor's office, and on the third floor is the Defence Against the Dark Arts Classroom.

1994–1995 school year
After their first Defence Against the Dark Arts lesson in their fourth year, Harry Potter and his classmates walked back down this staircase. Then, Bartemius Crouch Jr. posing as their then-teacher Alastor Moody stopped Neville Longbottom and subsequently gave him the Magical Water Plants of the Mediterranean book which later helped Harry Potter to succeed in the Second Task of the Triwizard Tournament.

Behind the scenes

 * Although the tower where this is located is replaced by the Astronomy Tower in the film and video game adaptations of Harry Potter and the Half-Blood Prince, the contents still remain.
 * The scenes in this staircase were filmed in St. Paul's Cathedral, Ludgate Hill, London, England, UK. The set used for this staircase was the one used for the Divination Tower staircase in the film adaptation of Harry Potter and the Prisoner of Azkaban.

Appearances

 * Harry Potter and the Goblet of Fire (film)
 * Harry Potter and the Order of the Phoenix (video game)
 * Harry Potter and the Half-Blood Prince (video game)