Professor Cuthbert Binns was a wizard and History of Magic professor at Hogwarts School of Witchcraft and Wizardry. He owned an office in the main castle and Classroom 4F on the first floor to teach in. He taught until a very old age, when he fell asleep in the staff room and died in slumber. Afterwards, he became a ghost who continued to teach, droning on about various Goblin Rebellions and giant wars to bored, sleeping students.