The common room of Ravenclaw is located in one of the towers of the castle, is wide and circular, to reach the room must be climbed by a very narrow spiral staircase. The room has large arched windows very decorated, and the walls are decorated with blue and bronze tapestries. The vaulted ceiling is painted like the starry sky, this decoration is repeated in the same way on the dark blue carpet. Tables, chairs and bookshelves are set in the living room, and a marble sculpture by Rowena Ravenclaw is placed next to the door that leads to the bedrooms. Harry Potter entered this common room in 1998 while looking for clues to the location of one of Voldemort's horrocruxes, the diadem. Unlike the other common rooms of the castle, in order to enter, a riddle that was not always the same, formulated by an eagle-shaped bronze knocker in a door without a latch was to be solved.

It is necessary to give the correct answer for the door to open. Otherwise, it would be necessary to wait for another student of Ravenclaw that can solve the proposed riddle. Some of the questions before the battle of Hogwarts were: What was before, the phoenix or the flame? The correct answer was "the circle has no beginning". Minutes later the new riddle was: Where do the vanished objects go? The correct answer is: "To nothing, that is, to everything".

This could be annoying, and anyone with enough intelligence could enter the bedrooms, a great example is Harry Potter and the Deathly Hallows, where Professor McGonagall had no problem entering correctly answering the riddle. However, Hermione claimed in her first year that most wizards and witches do not have much sense of logic, so Ravenclaw stopped asking for passwords and began to make puzzles.