The Trophy Room is a room on the Third Floor of the Hogwarts Castle. Awards, trophies, cups, plates, shields, statues, and medals are kept in crystal glass displays in this room. This room also contains a list of Head Boys and Head Girls. Prominently displayed are Hogwarts Awards for Services to the School, with known recipients being Tom Marvolo Riddle, Harry Potter and Ron Weasley. In 1995, the Triwizard Cup was placed here as well. The Trophy Room is connected to an Armour Gallery. A portrait of Brutus Scrimgeour hangs on one of the walls, hiding a passageway to the fourth floor corridor.

Defence Against the Dark Arts, also known as D.A.D.A, is a class taught at Hogwarts School of Witchcraft and Wizardry that focuses on defensive techniques to block spells, charms, curses, hexes and jinxes cast by other wizards, counteract the Dark Arts, and to protect from dark magical beasts and creatures such as the Boggart. Defence Against the Dark Arts is taught to Hogwarts students from the first year to the fifth, with the option of N.E.W.T. classes in the sixth and seventh years for students who qualify.

The third floor corridor once had a specific use in the nineties - but now it holds lovestruck teenagers out of bounds at night. The corridors are patrolled by our resident caretaker.

Charms is a subject taught at Hogwarts School of Witchcraft and Wizardry. It teaches general spells and wandwork, including such spells as Wingardium Leviosa, Accio and Aguamenti. Spells taught in this class are typically refered to as "charms," though this term can describe a myriad of spells.