The entrance to the Gryffindor Tower is the Portrait of the Fat Lady. If you tell her the correct password, the Portrait will swing open to reveal the Common Room. There are two staircases opening off the common room into the Tower itself: the boys’ staircase, on which the seven boys’ dormitories are located (one for each year) and the girls’ staircase, on which the seven girls’ dormitories are located (one for each year). The girls’ staircase is under a spell so that if a boy sets foot on it and persists for a few steps, a wailing klaxon goes off and the staircase temporarily Transfigures itself into a stone slide, sending him and anyone else on the stairs sailing to the bottom. According to Hogwarts: A History, the founders believed that girls were more trustworthy than boys, so that while the girls’ staircase is enchanted to prevent boys from getting in, the boys’ staircase does not carry a reciprocal enchantment (OP17). Each dormitory is a round room with windows looking out onto the grounds, and containing four-poster beds.
Astronomy Tower Dungeons and other subterranean chambers Gryffindor Tower Hogwarts corridors Hogwarts fifth floor Hogwarts first floor Hogwarts fourth floor
Hogwarts ground floor Hogwarts grounds Hogwarts second floor Hogwarts seventh floor Hogwarts sixth floor Hogwarts third floor Madam Hooch’s office
Philosopher's Stone Chapter 7 Chapter 9 Chapter 10 Chapter 11 Chapter 13 Chapter 15 Chamber of Secrets Chapter 7 Chapter 8 Chapter 11 Chapter 12 Chapter 13 Chapter 14 Chapter 16 Prisoner of Azkaban Chapter 5 Chapter 8 Chapter 10 Chapter 11 Chapter 12 Chapter 13
Chapter 14 Goblet of Fire Chapter 12 Chapter 15 Chapter 23 Chapter 25 Chapter 28 Chapter 29 Chapter 37 Order of the Phoenix Chapter 9 Chapter 11 Chapter 12 Chapter 13 Chapter 14 Chapter 15 Chapter 17 Chapter 18 Chapter 19 Chapter 20 Chapter 21 Chapter 22