The Dark Tower.
The Dark Tower was a small but high tower near the Transfiguration Courtyard at Hogwarts Castle. This tower seems to be used as a prison. It has several prison cells, with the topmost being at the roof. The cells are not, however, charmed or otherwise protected against breaking-in from the outside as Harry Potter and Hermione Granger broke out Sirius Black from this tower in 1994.
Behind the scenes
- This tower was built during the summer of 1993 as it first appeared in Harry Potter and the Prisoner of Azkaban.
- In the film adaptation of Harry Potter and the Prisoner of Azkaban, this tower is where Sirius Black is held prisoner, as opposed to Filius Flitwick's office in the West Tower.
- In the film adaptation of Harry Potter and the Half-Blood Prince, the Dark Tower, and the DADA Tower, are replaced by the Astronomy Tower.