Professor Armando Dippet (1637 – 1992) was Headmaster of Hogwarts School of Witchcraft and Wizardry, and the predecessor of Albus Dumbledore in the post. Dippet served as Headmaster in the 1940s into the 1960s (and possibly the very early 70s). It was during his tenure that the Chamber of Secrets was first opened by Tom Riddle since its creation by Salazar Slytherin in around A.D. 993. Unknowingly, Dippet was indirectly responsible for the end of the attacks by telling Riddle that the school...